diff --git a/models/actions/run_list.go b/models/actions/run_list.go
index 2628c4712f5..8b8c132a482 100644
--- a/models/actions/run_list.go
+++ b/models/actions/run_list.go
@@ -7,7 +7,6 @@ import (
 	"context"
 
 	"code.gitea.io/gitea/models/db"
-	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/translation"
@@ -25,12 +24,6 @@ func (runs RunList) GetUserIDs() []int64 {
 	})
 }
 
-func (runs RunList) GetRepoIDs() []int64 {
-	return container.FilterSlice(runs, func(run *ActionRun) (int64, bool) {
-		return run.RepoID, true
-	})
-}
-
 func (runs RunList) LoadTriggerUser(ctx context.Context) error {
 	userIDs := runs.GetUserIDs()
 	users := make(map[int64]*user_model.User, len(userIDs))
@@ -50,18 +43,6 @@ func (runs RunList) LoadTriggerUser(ctx context.Context) error {
 	return nil
 }
 
-func (runs RunList) LoadRepos(ctx context.Context) error {
-	repoIDs := runs.GetRepoIDs()
-	repos, err := repo_model.GetRepositoriesMapByIDs(ctx, repoIDs)
-	if err != nil {
-		return err
-	}
-	for _, run := range runs {
-		run.Repo = repos[run.RepoID]
-	}
-	return nil
-}
-
 type FindRunOptions struct {
 	db.ListOptions
 	RepoID           int64
diff --git a/models/actions/schedule_list.go b/models/actions/schedule_list.go
index 5361b94801a..6b5cae94fe9 100644
--- a/models/actions/schedule_list.go
+++ b/models/actions/schedule_list.go
@@ -4,62 +4,13 @@
 package actions
 
 import (
-	"context"
-
 	"code.gitea.io/gitea/models/db"
-	repo_model "code.gitea.io/gitea/models/repo"
-	user_model "code.gitea.io/gitea/models/user"
-	"code.gitea.io/gitea/modules/container"
 
 	"xorm.io/builder"
 )
 
 type ScheduleList []*ActionSchedule
 
-// GetUserIDs returns a slice of user's id
-func (schedules ScheduleList) GetUserIDs() []int64 {
-	return container.FilterSlice(schedules, func(schedule *ActionSchedule) (int64, bool) {
-		return schedule.TriggerUserID, true
-	})
-}
-
-func (schedules ScheduleList) GetRepoIDs() []int64 {
-	return container.FilterSlice(schedules, func(schedule *ActionSchedule) (int64, bool) {
-		return schedule.RepoID, true
-	})
-}
-
-func (schedules ScheduleList) LoadTriggerUser(ctx context.Context) error {
-	userIDs := schedules.GetUserIDs()
-	users := make(map[int64]*user_model.User, len(userIDs))
-	if err := db.GetEngine(ctx).In("id", userIDs).Find(&users); err != nil {
-		return err
-	}
-	for _, schedule := range schedules {
-		if schedule.TriggerUserID == user_model.ActionsUserID {
-			schedule.TriggerUser = user_model.NewActionsUser()
-		} else {
-			schedule.TriggerUser = users[schedule.TriggerUserID]
-			if schedule.TriggerUser == nil {
-				schedule.TriggerUser = user_model.NewGhostUser()
-			}
-		}
-	}
-	return nil
-}
-
-func (schedules ScheduleList) LoadRepos(ctx context.Context) error {
-	repoIDs := schedules.GetRepoIDs()
-	repos, err := repo_model.GetRepositoriesMapByIDs(ctx, repoIDs)
-	if err != nil {
-		return err
-	}
-	for _, schedule := range schedules {
-		schedule.Repo = repos[schedule.RepoID]
-	}
-	return nil
-}
-
 type FindScheduleOptions struct {
 	db.ListOptions
 	RepoID  int64
diff --git a/models/activities/action_list.go b/models/activities/action_list.go
index 29ff2fdf7a2..5b07a8e080a 100644
--- a/models/activities/action_list.go
+++ b/models/activities/action_list.go
@@ -282,9 +282,3 @@ func GetFeeds(ctx context.Context, opts GetFeedsOptions) (ActionList, int64, err
 
 	return actions, count, nil
 }
-
-func CountUserFeeds(ctx context.Context, userID int64) (int64, error) {
-	return db.GetEngine(ctx).Where("user_id = ?", userID).
-		And("is_deleted = ?", false).
-		Count(&Action{})
-}
diff --git a/models/asymkey/error.go b/models/asymkey/error.go
index b7656245791..5df7beb8cd7 100644
--- a/models/asymkey/error.go
+++ b/models/asymkey/error.go
@@ -192,28 +192,6 @@ func (err ErrGPGKeyIDAlreadyUsed) Unwrap() error {
 	return util.ErrAlreadyExist
 }
 
-// ErrGPGKeyAccessDenied represents a "GPGKeyAccessDenied" kind of Error.
-type ErrGPGKeyAccessDenied struct {
-	UserID int64
-	KeyID  int64
-}
-
-// IsErrGPGKeyAccessDenied checks if an error is a ErrGPGKeyAccessDenied.
-func IsErrGPGKeyAccessDenied(err error) bool {
-	_, ok := err.(ErrGPGKeyAccessDenied)
-	return ok
-}
-
-// Error pretty-prints an error of type ErrGPGKeyAccessDenied.
-func (err ErrGPGKeyAccessDenied) Error() string {
-	return fmt.Sprintf("user does not have access to the key [user_id: %d, key_id: %d]",
-		err.UserID, err.KeyID)
-}
-
-func (err ErrGPGKeyAccessDenied) Unwrap() error {
-	return util.ErrPermissionDenied
-}
-
 // ErrKeyAccessDenied represents a "KeyAccessDenied" kind of error.
 type ErrKeyAccessDenied struct {
 	UserID int64
diff --git a/models/asymkey/ssh_key_deploy.go b/models/asymkey/ssh_key_deploy.go
index 4ab84eabcf6..ea3d93e8c81 100644
--- a/models/asymkey/ssh_key_deploy.go
+++ b/models/asymkey/ssh_key_deploy.go
@@ -105,14 +105,6 @@ func addDeployKey(ctx context.Context, keyID, repoID int64, name, fingerprint st
 	return key, db.Insert(ctx, key)
 }
 
-// HasDeployKey returns true if public key is a deploy key of given repository.
-func HasDeployKey(ctx context.Context, keyID, repoID int64) bool {
-	has, _ := db.GetEngine(ctx).
-		Where("key_id = ? AND repo_id = ?", keyID, repoID).
-		Get(new(DeployKey))
-	return has
-}
-
 // AddDeployKey add new deploy key to database and authorized_keys file.
 func AddDeployKey(ctx context.Context, repoID int64, name, content string, readOnly bool) (*DeployKey, error) {
 	fingerprint, err := CalcFingerprint(content)
diff --git a/models/auth/webauthn.go b/models/auth/webauthn.go
index 6d8b5429579..7bd79ed3f52 100644
--- a/models/auth/webauthn.go
+++ b/models/auth/webauthn.go
@@ -200,13 +200,3 @@ func DeleteCredential(ctx context.Context, id, userID int64) (bool, error) {
 	had, err := db.GetEngine(ctx).ID(id).Where("user_id = ?", userID).Delete(&WebAuthnCredential{})
 	return had > 0, err
 }
-
-// WebAuthnCredentials implements the webauthn.User interface
-func WebAuthnCredentials(ctx context.Context, userID int64) ([]webauthn.Credential, error) {
-	dbCreds, err := GetWebAuthnCredentialsByUID(ctx, userID)
-	if err != nil {
-		return nil, err
-	}
-
-	return dbCreds.ToCredentials(), nil
-}
diff --git a/models/git/branch_list.go b/models/git/branch_list.go
index 25e84526d29..1445f3a5a02 100644
--- a/models/git/branch_list.go
+++ b/models/git/branch_list.go
@@ -7,7 +7,6 @@ import (
 	"context"
 
 	"code.gitea.io/gitea/models/db"
-	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/optional"
@@ -60,24 +59,6 @@ func (branches BranchList) LoadPusher(ctx context.Context) error {
 	return nil
 }
 
-func (branches BranchList) LoadRepo(ctx context.Context) error {
-	ids := container.FilterSlice(branches, func(branch *Branch) (int64, bool) {
-		return branch.RepoID, branch.RepoID > 0 && branch.Repo == nil
-	})
-
-	reposMap := make(map[int64]*repo_model.Repository, len(ids))
-	if err := db.GetEngine(ctx).In("id", ids).Find(&reposMap); err != nil {
-		return err
-	}
-	for _, branch := range branches {
-		if branch.RepoID <= 0 || branch.Repo != nil {
-			continue
-		}
-		branch.Repo = reposMap[branch.RepoID]
-	}
-	return nil
-}
-
 type FindBranchOptions struct {
 	db.ListOptions
 	RepoID             int64
diff --git a/models/issues/dependency.go b/models/issues/dependency.go
index 0eaa47e3593..db8054e1618 100644
--- a/models/issues/dependency.go
+++ b/models/issues/dependency.go
@@ -89,12 +89,6 @@ type ErrUnknownDependencyType struct {
 	Type DependencyType
 }
 
-// IsErrUnknownDependencyType checks if an error is ErrUnknownDependencyType
-func IsErrUnknownDependencyType(err error) bool {
-	_, ok := err.(ErrUnknownDependencyType)
-	return ok
-}
-
 func (err ErrUnknownDependencyType) Error() string {
 	return fmt.Sprintf("unknown dependency type [type: %d]", err.Type)
 }
diff --git a/models/issues/issue.go b/models/issues/issue.go
index 838d41a3005..ec58cd04f6e 100644
--- a/models/issues/issue.go
+++ b/models/issues/issue.go
@@ -48,21 +48,6 @@ func (err ErrIssueNotExist) Unwrap() error {
 	return util.ErrNotExist
 }
 
-// ErrNewIssueInsert is used when the INSERT statement in newIssue fails
-type ErrNewIssueInsert struct {
-	OriginalError error
-}
-
-// IsErrNewIssueInsert checks if an error is a ErrNewIssueInsert.
-func IsErrNewIssueInsert(err error) bool {
-	_, ok := err.(ErrNewIssueInsert)
-	return ok
-}
-
-func (err ErrNewIssueInsert) Error() string {
-	return err.OriginalError.Error()
-}
-
 var ErrIssueAlreadyChanged = util.NewInvalidArgumentErrorf("the issue is already changed")
 
 // Issue represents an issue or pull request of repository.
diff --git a/models/issues/issue_pin.go b/models/issues/issue_pin.go
index ae6195b05dd..753c96ed180 100644
--- a/models/issues/issue_pin.go
+++ b/models/issues/issue_pin.go
@@ -165,27 +165,6 @@ func MovePin(ctx context.Context, issue *Issue, newPosition int) error {
 	})
 }
 
-func GetPinnedIssueIDs(ctx context.Context, repoID int64, isPull bool) ([]int64, error) {
-	var issuePins []IssuePin
-	if err := db.GetEngine(ctx).
-		Table("issue_pin").
-		Where("repo_id = ?", repoID).
-		And("is_pull = ?", isPull).
-		Find(&issuePins); err != nil {
-		return nil, err
-	}
-
-	sort.Slice(issuePins, func(i, j int) bool {
-		return issuePins[i].PinOrder < issuePins[j].PinOrder
-	})
-
-	var ids []int64
-	for _, pin := range issuePins {
-		ids = append(ids, pin.IssueID)
-	}
-	return ids, nil
-}
-
 func GetIssuePinsByRepoID(ctx context.Context, repoID int64, isPull bool) ([]*IssuePin, error) {
 	var pins []*IssuePin
 	if err := db.GetEngine(ctx).Where("repo_id = ? AND is_pull = ?", repoID, isPull).Find(&pins); err != nil {
diff --git a/models/issues/issue_update.go b/models/issues/issue_update.go
index 01a3eb9a2af..c58a2f319dd 100644
--- a/models/issues/issue_update.go
+++ b/models/issues/issue_update.go
@@ -93,12 +93,6 @@ type ErrIssueIsOpen struct {
 	Index  int64
 }
 
-// IsErrIssueIsOpen checks if an error is a ErrIssueIsOpen.
-func IsErrIssueIsOpen(err error) bool {
-	_, ok := err.(ErrIssueIsOpen)
-	return ok
-}
-
 func (err ErrIssueIsOpen) Error() string {
 	return fmt.Sprintf("%s [id: %d, repo_id: %d, index: %d] is already open", util.Iif(err.IsPull, "Pull Request", "Issue"), err.ID, err.RepoID, err.Index)
 }
@@ -441,7 +435,7 @@ func NewIssue(ctx context.Context, repo *repo_model.Repository, issue *Issue, la
 			LabelIDs:    labelIDs,
 			Attachments: uuids,
 		}); err != nil {
-			if repo_model.IsErrUserDoesNotHaveAccessToRepo(err) || IsErrNewIssueInsert(err) {
+			if repo_model.IsErrUserDoesNotHaveAccessToRepo(err) {
 				return err
 			}
 			return fmt.Errorf("newIssue: %w", err)
diff --git a/models/issues/pull.go b/models/issues/pull.go
index 1b883f29810..1fb42915f60 100644
--- a/models/issues/pull.go
+++ b/models/issues/pull.go
@@ -475,7 +475,7 @@ func NewPullRequest(ctx context.Context, repo *repo_model.Repository, issue *Iss
 			LabelIDs:    labelIDs,
 			Attachments: uuids,
 		}); err != nil {
-			if repo_model.IsErrUserDoesNotHaveAccessToRepo(err) || IsErrNewIssueInsert(err) {
+			if repo_model.IsErrUserDoesNotHaveAccessToRepo(err) {
 				return err
 			}
 			return fmt.Errorf("newIssue: %w", err)
diff --git a/models/organization/team_unit.go b/models/organization/team_unit.go
index c6ec6b39b2c..b5237c2c587 100644
--- a/models/organization/team_unit.go
+++ b/models/organization/team_unit.go
@@ -28,19 +28,3 @@ func (t *TeamUnit) Unit() unit.Unit {
 func getUnitsByTeamID(ctx context.Context, teamID int64) (units []*TeamUnit, err error) {
 	return units, db.GetEngine(ctx).Where("team_id = ?", teamID).Find(&units)
 }
-
-// UpdateTeamUnits updates a teams's units
-func UpdateTeamUnits(ctx context.Context, team *Team, units []TeamUnit) (err error) {
-	return db.WithTx(ctx, func(ctx context.Context) error {
-		if _, err = db.GetEngine(ctx).Where("team_id = ?", team.ID).Delete(new(TeamUnit)); err != nil {
-			return err
-		}
-
-		if len(units) > 0 {
-			if err = db.Insert(ctx, units); err != nil {
-				return err
-			}
-		}
-		return nil
-	})
-}
diff --git a/models/organization/team_user.go b/models/organization/team_user.go
index d6d0a5054dd..d24a4c51263 100644
--- a/models/organization/team_user.go
+++ b/models/organization/team_user.go
@@ -36,14 +36,6 @@ type SearchMembersOptions struct {
 	TeamID int64
 }
 
-func (opts SearchMembersOptions) ToConds() builder.Cond {
-	cond := builder.NewCond()
-	if opts.TeamID > 0 {
-		cond = cond.And(builder.Eq{"": opts.TeamID})
-	}
-	return cond
-}
-
 // GetTeamMembers returns all members in given team of organization.
 func GetTeamMembers(ctx context.Context, opts *SearchMembersOptions) ([]*user_model.User, error) {
 	var members []*user_model.User
diff --git a/models/project/column.go b/models/project/column.go
index 997e82ddf90..9c9abb4599d 100644
--- a/models/project/column.go
+++ b/models/project/column.go
@@ -337,20 +337,6 @@ func SetDefaultColumn(ctx context.Context, projectID, columnID int64) error {
 	})
 }
 
-// UpdateColumnSorting update project column sorting
-func UpdateColumnSorting(ctx context.Context, cl ColumnList) error {
-	return db.WithTx(ctx, func(ctx context.Context) error {
-		for i := range cl {
-			if _, err := db.GetEngine(ctx).ID(cl[i].ID).Cols(
-				"sorting",
-			).Update(cl[i]); err != nil {
-				return err
-			}
-		}
-		return nil
-	})
-}
-
 func GetColumnsByIDs(ctx context.Context, projectID int64, columnsIDs []int64) (ColumnList, error) {
 	columns := make([]*Column, 0, 5)
 	if len(columnsIDs) == 0 {
diff --git a/models/repo/topic.go b/models/repo/topic.go
index 6d5209d8210..14017da2d0b 100644
--- a/models/repo/topic.go
+++ b/models/repo/topic.go
@@ -44,12 +44,6 @@ type ErrTopicNotExist struct {
 	Name string
 }
 
-// IsErrTopicNotExist checks if an error is an ErrTopicNotExist.
-func IsErrTopicNotExist(err error) bool {
-	_, ok := err.(ErrTopicNotExist)
-	return ok
-}
-
 // Error implements error interface
 func (err ErrTopicNotExist) Error() string {
 	return fmt.Sprintf("topic is not exist [name: %s]", err.Name)
diff --git a/models/system/notice.go b/models/system/notice.go
index f39188f8fb3..4b919dffc92 100644
--- a/models/system/notice.go
+++ b/models/system/notice.go
@@ -13,7 +13,6 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/storage"
 	"code.gitea.io/gitea/modules/timeutil"
-	"code.gitea.io/gitea/modules/util"
 )
 
 // NoticeType describes the notice type
@@ -60,18 +59,6 @@ func CreateRepositoryNotice(desc string, args ...any) error {
 	return CreateNotice(graceful.GetManager().ShutdownContext(), NoticeRepository, desc, args...)
 }
 
-// RemoveAllWithNotice removes all directories in given path and
-// creates a system notice when error occurs.
-func RemoveAllWithNotice(ctx context.Context, title, path string) {
-	if err := util.RemoveAll(path); err != nil {
-		desc := fmt.Sprintf("%s [%s]: %v", title, path, err)
-		log.Warn(title+" [%s]: %v", path, err)
-		if err = CreateNotice(graceful.GetManager().ShutdownContext(), NoticeRepository, desc); err != nil {
-			log.Error("CreateRepositoryNotice: %v", err)
-		}
-	}
-}
-
 // RemoveStorageWithNotice removes a file from the storage and
 // creates a system notice when error occurs.
 func RemoveStorageWithNotice(ctx context.Context, bucket storage.ObjectStorage, title, path string) {
diff --git a/models/user/badge.go b/models/user/badge.go
index fbba8659261..a41eda07b5e 100644
--- a/models/user/badge.go
+++ b/models/user/badge.go
@@ -212,12 +212,6 @@ func RemoveUserBadges(ctx context.Context, u *User, badges []*Badge) error {
 	})
 }
 
-// RemoveAllUserBadges removes all badges from a user.
-func RemoveAllUserBadges(ctx context.Context, u *User) error {
-	_, err := db.GetEngine(ctx).Where("user_id=?", u.ID).Delete(&UserBadge{})
-	return err
-}
-
 // SearchBadgeOptions represents the options when finding badges
 type SearchBadgeOptions struct {
 	db.ListOptions
@@ -258,16 +252,3 @@ func (opts *SearchBadgeOptions) ToOrders() string {
 func SearchBadges(ctx context.Context, opts *SearchBadgeOptions) ([]*Badge, int64, error) {
 	return db.FindAndCount[Badge](ctx, opts)
 }
-
-// GetBadgeByID returns a specific badge by ID
-func GetBadgeByID(ctx context.Context, id int64) (*Badge, error) {
-	badge := new(Badge)
-	has, err := db.GetEngine(ctx).ID(id).Get(badge)
-	if err != nil {
-		return nil, err
-	}
-	if !has {
-		return nil, util.NewNotExistErrorf("badge does not exist [id: %d]", id)
-	}
-	return badge, nil
-}
diff --git a/models/user/email_address.go b/models/user/email_address.go
index aa483d5f005..670d417f9e6 100644
--- a/models/user/email_address.go
+++ b/models/user/email_address.go
@@ -147,11 +147,6 @@ func InsertEmailAddress(ctx context.Context, email *EmailAddress) (*EmailAddress
 	return email, nil
 }
 
-func UpdateEmailAddress(ctx context.Context, email *EmailAddress) error {
-	_, err := db.GetEngine(ctx).ID(email.ID).AllCols().Update(email)
-	return err
-}
-
 // ValidateEmail check if email is a valid & allowed address
 func ValidateEmail(email string) error {
 	if err := validateEmailBasic(email); err != nil {
diff --git a/models/user/error.go b/models/user/error.go
index cbf19998d10..5a956a2afe1 100644
--- a/models/user/error.go
+++ b/models/user/error.go
@@ -71,27 +71,6 @@ func (err ErrUserProhibitLogin) Unwrap() error {
 	return util.ErrPermissionDenied
 }
 
-// ErrUserInactive represents a "ErrUserInactive" kind of error.
-type ErrUserInactive struct {
-	UID  int64
-	Name string
-}
-
-// IsErrUserInactive checks if an error is a ErrUserInactive
-func IsErrUserInactive(err error) bool {
-	_, ok := err.(ErrUserInactive)
-	return ok
-}
-
-func (err ErrUserInactive) Error() string {
-	return fmt.Sprintf("user is inactive [uid: %d, name: %s]", err.UID, err.Name)
-}
-
-// Unwrap unwraps this error as a ErrPermission error
-func (err ErrUserInactive) Unwrap() error {
-	return util.ErrPermissionDenied
-}
-
 // ErrUserIsNotLocal represents a "ErrUserIsNotLocal" kind of error.
 type ErrUserIsNotLocal struct {
 	UID  int64
diff --git a/models/user/external_login_user.go b/models/user/external_login_user.go
index 0e764efb9fe..636a2007ee8 100644
--- a/models/user/external_login_user.go
+++ b/models/user/external_login_user.go
@@ -21,12 +21,6 @@ type ErrExternalLoginUserAlreadyExist struct {
 	LoginSourceID int64
 }
 
-// IsErrExternalLoginUserAlreadyExist checks if an error is a ExternalLoginUserAlreadyExist.
-func IsErrExternalLoginUserAlreadyExist(err error) bool {
-	_, ok := err.(ErrExternalLoginUserAlreadyExist)
-	return ok
-}
-
 func (err ErrExternalLoginUserAlreadyExist) Error() string {
 	return fmt.Sprintf("external login user already exists [externalID: %s, userID: %d, loginSourceID: %d]", err.ExternalID, err.UserID, err.LoginSourceID)
 }
@@ -41,12 +35,6 @@ type ErrExternalLoginUserNotExist struct {
 	LoginSourceID int64
 }
 
-// IsErrExternalLoginUserNotExist checks if an error is a ExternalLoginUserNotExist.
-func IsErrExternalLoginUserNotExist(err error) bool {
-	_, ok := err.(ErrExternalLoginUserNotExist)
-	return ok
-}
-
 func (err ErrExternalLoginUserNotExist) Error() string {
 	return fmt.Sprintf("external login user link does not exists [userID: %d, loginSourceID: %d]", err.UserID, err.LoginSourceID)
 }
diff --git a/models/user/setting.go b/models/user/setting.go
index a16fc86e55e..67b45208fcf 100644
--- a/models/user/setting.go
+++ b/models/user/setting.go
@@ -50,12 +50,6 @@ func (err ErrUserSettingIsNotExist) Unwrap() error {
 	return util.ErrNotExist
 }
 
-// IsErrUserSettingIsNotExist return true if err is ErrSettingIsNotExist
-func IsErrUserSettingIsNotExist(err error) bool {
-	_, ok := err.(ErrUserSettingIsNotExist)
-	return ok
-}
-
 // genSettingCacheKey returns the cache key for some configuration
 func genSettingCacheKey(userID int64, key string) string {
 	return fmt.Sprintf("user_%d.setting.%s", userID, key)
diff --git a/modules/actions/jobparser/jobparser.go b/modules/actions/jobparser/jobparser.go
index 1d4c4c1756a..76f229a54b3 100644
--- a/modules/actions/jobparser/jobparser.go
+++ b/modules/actions/jobparser/jobparser.go
@@ -83,12 +83,6 @@ func Parse(content []byte, options ...ParseOption) ([]*SingleWorkflow, error) {
 	return ret, nil
 }
 
-func WithJobResults(results map[string]string) ParseOption {
-	return func(c *parseContext) {
-		c.jobResults = results
-	}
-}
-
 func WithGitContext(context *model.GithubContext) ParseOption {
 	return func(c *parseContext) {
 		c.gitContext = context
diff --git a/modules/eventsource/event.go b/modules/eventsource/event.go
index ebcca509034..c72cc466a03 100644
--- a/modules/eventsource/event.go
+++ b/modules/eventsource/event.go
@@ -7,7 +7,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"strings"
 	"time"
 
 	"code.gitea.io/gitea/modules/json"
@@ -110,9 +109,3 @@ func (e *Event) WriteTo(w io.Writer) (int64, error) {
 
 	return sum, err
 }
-
-func (e *Event) String() string {
-	buf := new(strings.Builder)
-	_, _ = e.WriteTo(buf)
-	return buf.String()
-}
diff --git a/modules/gitrepo/commit.go b/modules/gitrepo/commit.go
index 0ab17862fee..0a8cb0544cb 100644
--- a/modules/gitrepo/commit.go
+++ b/modules/gitrepo/commit.go
@@ -44,23 +44,6 @@ func CommitsCount(ctx context.Context, repo Repository, opts CommitsCountOptions
 	return strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
 }
 
-// CommitsCountBetween return numbers of commits between two commits
-func CommitsCountBetween(ctx context.Context, repo Repository, start, end string) (int64, error) {
-	count, err := CommitsCount(ctx, repo, CommitsCountOptions{
-		Revision: []string{start + ".." + end},
-	})
-
-	if err != nil && strings.Contains(err.Error(), "no merge base") {
-		// future versions of git >= 2.28 are likely to return an error if before and last have become unrelated.
-		// previously it would return the results of git rev-list before last so let's try that...
-		return CommitsCount(ctx, repo, CommitsCountOptions{
-			Revision: []string{start, end},
-		})
-	}
-
-	return count, err
-}
-
 // FileCommitsCount return the number of files at a revision
 func FileCommitsCount(ctx context.Context, repo Repository, revision, file string) (int64, error) {
 	return CommitsCount(ctx, repo,
diff --git a/modules/gitrepo/config.go b/modules/gitrepo/config.go
index 9be3ef94aeb..4940f1c0788 100644
--- a/modules/gitrepo/config.go
+++ b/modules/gitrepo/config.go
@@ -5,21 +5,11 @@ package gitrepo
 
 import (
 	"context"
-	"strings"
 
 	"code.gitea.io/gitea/modules/git/gitcmd"
 	"code.gitea.io/gitea/modules/globallock"
 )
 
-func GitConfigGet(ctx context.Context, repo Repository, key string) (string, error) {
-	result, _, err := RunCmdString(ctx, repo, gitcmd.NewCommand("config", "--get").
-		AddDynamicArguments(key))
-	if err != nil {
-		return "", err
-	}
-	return strings.TrimSpace(result), nil
-}
-
 func getRepoConfigLockKey(repoStoragePath string) string {
 	return "repo-config:" + repoStoragePath
 }
diff --git a/modules/hostmatcher/hostmatcher.go b/modules/hostmatcher/hostmatcher.go
index 15c63714222..044dba679a1 100644
--- a/modules/hostmatcher/hostmatcher.go
+++ b/modules/hostmatcher/hostmatcher.go
@@ -78,11 +78,6 @@ func (hl *HostMatchList) AppendBuiltin(builtin string) {
 	hl.builtins = append(hl.builtins, builtin)
 }
 
-// AppendPattern appends more pattern to match
-func (hl *HostMatchList) AppendPattern(pattern string) {
-	hl.patterns = append(hl.patterns, pattern)
-}
-
 // IsEmpty checks if the checklist is empty
 func (hl *HostMatchList) IsEmpty() bool {
 	return hl == nil || (len(hl.builtins) == 0 && len(hl.patterns) == 0 && len(hl.ipNets) == 0)
diff --git a/modules/markup/markdown/markdown.go b/modules/markup/markdown/markdown.go
index f6a6cb26c6d..1cc75d763d1 100644
--- a/modules/markup/markdown/markdown.go
+++ b/modules/markup/markdown/markdown.go
@@ -74,10 +74,6 @@ func (r *GlodmarkRender) Convert(source []byte, writer io.Writer, opts ...parser
 	return r.goldmarkMarkdown.Convert(source, writer, opts...)
 }
 
-func (r *GlodmarkRender) Renderer() renderer.Renderer {
-	return r.goldmarkMarkdown.Renderer()
-}
-
 func (r *GlodmarkRender) highlightingRenderer(w util.BufWriter, c highlighting.CodeBlockContext, entering bool) {
 	if entering {
 		languageBytes, _ := c.Language()
diff --git a/modules/storage/storage.go b/modules/storage/storage.go
index e19c421ba82..1271440e5a8 100644
--- a/modules/storage/storage.go
+++ b/modules/storage/storage.go
@@ -21,25 +21,6 @@ import (
 // ErrURLNotSupported represents url is not supported
 var ErrURLNotSupported = errors.New("url method not supported")
 
-// ErrInvalidConfiguration is called when there is invalid configuration for a storage
-type ErrInvalidConfiguration struct {
-	cfg any
-	err error
-}
-
-func (err ErrInvalidConfiguration) Error() string {
-	if err.err != nil {
-		return fmt.Sprintf("Invalid Configuration Argument: %v: Error: %v", err.cfg, err.err)
-	}
-	return fmt.Sprintf("Invalid Configuration Argument: %v", err.cfg)
-}
-
-// IsErrInvalidConfiguration checks if an error is an ErrInvalidConfiguration
-func IsErrInvalidConfiguration(err error) bool {
-	_, ok := err.(ErrInvalidConfiguration)
-	return ok
-}
-
 type Type = setting.StorageType
 
 // NewStorageFunc is a function that creates a storage
diff --git a/modules/web/middleware/locale.go b/modules/web/middleware/locale.go
index 34a16f04e7f..fc396f08081 100644
--- a/modules/web/middleware/locale.go
+++ b/modules/web/middleware/locale.go
@@ -51,9 +51,3 @@ func Locale(resp http.ResponseWriter, req *http.Request) translation.Locale {
 func SetLocaleCookie(resp http.ResponseWriter, lang string, maxAge int) {
 	SetSiteCookie(resp, "lang", lang, maxAge)
 }
-
-// DeleteLocaleCookie convenience function to delete the locale cookie consistently
-// Setting the lang cookie will trigger the middleware to reset the language to previous state.
-func DeleteLocaleCookie(resp http.ResponseWriter) {
-	SetSiteCookie(resp, "lang", "", -1)
-}
diff --git a/routers/api/v1/user/gpg_key.go b/routers/api/v1/user/gpg_key.go
index 9ec4d2c938a..39ded31bf48 100644
--- a/routers/api/v1/user/gpg_key.go
+++ b/routers/api/v1/user/gpg_key.go
@@ -281,11 +281,7 @@ func DeleteGPGKey(ctx *context.APIContext) {
 	}
 
 	if err := asymkey_model.DeleteGPGKey(ctx, ctx.Doer, ctx.PathParamInt64("id")); err != nil {
-		if asymkey_model.IsErrGPGKeyAccessDenied(err) {
-			ctx.APIError(http.StatusForbidden, "You do not have access to this key")
-		} else {
-			ctx.APIErrorInternal(err)
-		}
+		ctx.APIErrorInternal(err)
 		return
 	}
 
@@ -295,8 +291,6 @@ func DeleteGPGKey(ctx *context.APIContext) {
 // HandleAddGPGKeyError handle add GPGKey error
 func HandleAddGPGKeyError(ctx *context.APIContext, err error, token string) {
 	switch {
-	case asymkey_model.IsErrGPGKeyAccessDenied(err):
-		ctx.APIError(http.StatusUnprocessableEntity, "You do not have access to this GPG key")
 	case asymkey_model.IsErrGPGKeyIDAlreadyUsed(err):
 		ctx.APIError(http.StatusUnprocessableEntity, "A key with the same id already exists")
 	case asymkey_model.IsErrGPGKeyParsing(err):
diff --git a/routers/web/auth/auth.go b/routers/web/auth/auth.go
index d705062b3d8..eb2045781dd 100644
--- a/routers/web/auth/auth.go
+++ b/routers/web/auth/auth.go
@@ -314,15 +314,6 @@ func SignInPost(ctx *context.Context) {
 			log.Warn("Failed authentication attempt for %s from %s: %v", form.UserName, ctx.RemoteAddr(), err)
 			ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
 			ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
-		} else if user_model.IsErrUserInactive(err) {
-			if setting.Service.RegisterEmailConfirm {
-				ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
-				ctx.HTML(http.StatusOK, TplActivate)
-			} else {
-				log.Warn("Failed authentication attempt for %s from %s: %v", form.UserName, ctx.RemoteAddr(), err)
-				ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
-				ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
-			}
 		} else {
 			ctx.ServerError("UserSignIn", err)
 		}
diff --git a/routers/web/auth/linkaccount.go b/routers/web/auth/linkaccount.go
index 02e1b7acd2f..ea3aa3f7cae 100644
--- a/routers/web/auth/linkaccount.go
+++ b/routers/web/auth/linkaccount.go
@@ -105,16 +105,6 @@ func handleSignInError(ctx *context.Context, userName string, ptrForm any, tmpl
 		log.Info("Failed authentication attempt for %s from %s: %v", userName, ctx.RemoteAddr(), err)
 		ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
 		ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
-	} else if user_model.IsErrUserInactive(err) {
-		ctx.Data["user_exists"] = true
-		if setting.Service.RegisterEmailConfirm {
-			ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
-			ctx.HTML(http.StatusOK, TplActivate)
-		} else {
-			log.Info("Failed authentication attempt for %s from %s: %v", userName, ctx.RemoteAddr(), err)
-			ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
-			ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
-		}
 	} else {
 		ctx.ServerError(invoker, err)
 	}
diff --git a/routers/web/home.go b/routers/web/home.go
index 7efa5f344e3..d14a7bab13f 100644
--- a/routers/web/home.go
+++ b/routers/web/home.go
@@ -109,9 +109,3 @@ func HomeSitemap(ctx *context.Context) {
 		log.Error("Failed writing sitemap: %v", err)
 	}
 }
-
-// NotFound render 404 page
-func NotFound(ctx *context.Context) {
-	ctx.Data["Title"] = "Page Not Found"
-	ctx.NotFound(nil)
-}
diff --git a/routers/web/org/projects.go b/routers/web/org/projects.go
index 4cdf81c1559..59aee819742 100644
--- a/routers/web/org/projects.go
+++ b/routers/web/org/projects.go
@@ -35,14 +35,6 @@ const (
 	tplProjectsView templates.TplName = "org/projects/view"
 )
 
-// MustEnableProjects check if projects are enabled in settings
-func MustEnableProjects(ctx *context.Context) {
-	if unit.TypeProjects.UnitGlobalDisabled() {
-		ctx.NotFound(nil)
-		return
-	}
-}
-
 // Projects renders the home page of projects
 func Projects(ctx *context.Context) {
 	if _, err := shared_user.RenderUserOrgHeader(ctx); err != nil {
diff --git a/routers/web/shared/actions/runners.go b/routers/web/shared/actions/runners.go
index 3609258440c..9d8b2f08eb1 100644
--- a/routers/web/shared/actions/runners.go
+++ b/routers/web/shared/actions/runners.go
@@ -362,10 +362,6 @@ func RunnerUpdatePost(ctx *context.Context) {
 	ctx.JSONRedirect("")
 }
 
-func RedirectToDefaultSetting(ctx *context.Context) {
-	ctx.Redirect(ctx.Repo.RepoLink + "/settings/actions/runners")
-}
-
 func findActionsRunner(ctx *context.Context, rCtx *runnersCtx) *actions_model.ActionRunner {
 	runnerID := ctx.PathParamInt64("runnerid")
 	opts := &actions_model.FindRunnerOptions{
diff --git a/services/context/user.go b/services/context/user.go
index 19c055e2a30..138cdeae937 100644
--- a/services/context/user.go
+++ b/services/context/user.go
@@ -30,27 +30,6 @@ func UserAssignmentWeb() func(ctx *Context) {
 	}
 }
 
-// UserIDAssignmentAPI returns a middleware to handle context-user assignment for api routes
-func UserIDAssignmentAPI() func(ctx *APIContext) {
-	return func(ctx *APIContext) {
-		userID := ctx.PathParamInt64("user-id")
-
-		if ctx.IsSigned && ctx.Doer.ID == userID {
-			ctx.ContextUser = ctx.Doer
-		} else {
-			var err error
-			ctx.ContextUser, err = user_model.GetUserByID(ctx, userID)
-			if err != nil {
-				if user_model.IsErrUserNotExist(err) {
-					ctx.APIError(http.StatusNotFound, err)
-				} else {
-					ctx.APIErrorInternal(err)
-				}
-			}
-		}
-	}
-}
-
 // UserAssignmentAPI returns a middleware to handle context-user assignment for api routes
 func UserAssignmentAPI() func(ctx *APIContext) {
 	return func(ctx *APIContext) {
diff --git a/services/convert/secret.go b/services/convert/secret.go
deleted file mode 100644
index dd7b9f0a6a9..00000000000
--- a/services/convert/secret.go
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2023 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package convert
-
-import (
-	secret_model "code.gitea.io/gitea/models/secret"
-	api "code.gitea.io/gitea/modules/structs"
-)
-
-// ToSecret converts Secret to API format
-func ToSecret(secret *secret_model.Secret) *api.Secret {
-	result := &api.Secret{
-		Name: secret.Name,
-	}
-
-	return result
-}
diff --git a/services/forms/repo_form.go b/services/forms/repo_form.go
index 01e57a596ef..09b9b2690c4 100644
--- a/services/forms/repo_form.go
+++ b/services/forms/repo_form.go
@@ -740,14 +740,3 @@ func (f *AddTimeManuallyForm) Validate(req *http.Request, errs binding.Errors) b
 type SaveTopicForm struct {
 	Topics []string `binding:"topics;Required;"`
 }
-
-// DeadlineForm hold the validation rules for deadlines
-type DeadlineForm struct {
-	DateString string `form:"date" binding:"Required;Size(10)"`
-}
-
-// Validate validates the fields
-func (f *DeadlineForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetValidateContext(req)
-	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
-}
diff --git a/services/repository/files/content.go b/services/repository/files/content.go
index fc0e00a1a72..9b042f9e67a 100644
--- a/services/repository/files/content.go
+++ b/services/repository/files/content.go
@@ -32,11 +32,6 @@ const (
 	ContentTypeSubmodule ContentType = "submodule" // submodule content type (submodule)
 )
 
-// String gets the string of ContentType
-func (ct *ContentType) String() string {
-	return string(*ct)
-}
-
 type GetContentsOrListOptions struct {
 	TreePath                 string
 	IncludeSingleFileContent bool // include the file's content when the tree path is a file
diff --git a/services/repository/files/tree.go b/services/repository/files/tree.go
index e678b07f565..fc361273388 100644
--- a/services/repository/files/tree.go
+++ b/services/repository/files/tree.go
@@ -26,12 +26,6 @@ type ErrSHANotFound struct {
 	SHA string
 }
 
-// IsErrSHANotFound checks if an error is a ErrSHANotFound.
-func IsErrSHANotFound(err error) bool {
-	_, ok := err.(ErrSHANotFound)
-	return ok
-}
-
 func (err ErrSHANotFound) Error() string {
 	return fmt.Sprintf("sha not found [%s]", err.SHA)
 }