Bring back the sensitive data filtering feature (#280)

* Bring back the sensitive data filtering feature

* Add `// global` comment

shared/models.go

@@ -74,12 +74,6 @@ func CreateWebSocketMessageTypeAnalyzeStatus(analyzeStatus AnalyzeStatus) WebSoc
 	}
 }
 
-type TrafficFilteringOptions struct {
-	HealthChecksUserAgentHeaders []string
-	PlainTextMaskingRegexes      []*SerializableRegexp
-	DisableRedaction             bool
-}
-
 type VersionResponse struct {
 	SemVer string `json:"semver"`
 }

shared/serializableRegexp.go

@@ -1,30 +0,0 @@
-package shared
-
-import "regexp"
-
-type SerializableRegexp struct {
-	regexp.Regexp
-}
-
-func CompileRegexToSerializableRegexp(expr string) (*SerializableRegexp, error) {
-	re, err := regexp.Compile(expr)
-	if err != nil {
-		return nil, err
-	}
-	return &SerializableRegexp{*re}, nil
-}
-
-// UnmarshalText is by json.Unmarshal.
-func (r *SerializableRegexp) UnmarshalText(text []byte) error {
-	rr, err := CompileRegexToSerializableRegexp(string(text))
-	if err != nil {
-		return err
-	}
-	*r = *rr
-	return nil
-}
-
-// MarshalText is used by json.Marshal.
-func (r *SerializableRegexp) MarshalText() ([]byte, error) {
-	return []byte(r.String()), nil
-}