diff --git a/staging/src/k8s.io/code-generator/generate-groups.sh b/staging/src/k8s.io/code-generator/generate-groups.sh
index a21d2184f0b..65b0abda5a6 100755
--- a/staging/src/k8s.io/code-generator/generate-groups.sh
+++ b/staging/src/k8s.io/code-generator/generate-groups.sh
@@ -14,53 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -o errexit
-set -o nounset
-set -o pipefail
-
-# generate-groups generates everything for a project with external types only, e.g. a project based
-# on CustomResourceDefinitions.
-
-if [ "$#" -lt 4 ] || [ "${1}" == "--help" ]; then
-  cat <<EOF
-Usage: $(basename "$0") <generators> <output-package> <apis-package> <groups-versions> ...
-
-  <generators>        the generators comma separated to run (deepcopy,defaulter,applyconfiguration,client,lister,informer).
-  <output-package>    the output package name (e.g. github.com/example/project/pkg/generated).
-  <apis-package>      the external types dir (e.g. github.com/example/api or github.com/example/project/pkg/apis).
-  <groups-versions>   the groups and their versions in the format "groupA:v1,v2 groupB:v1 groupC:v2", relative
-                      to <api-package>.
-  ...                 arbitrary flags passed to all generator binaries.
-
-
-Example:
-  $(basename "$0") \
-      deepcopy,client \
-      github.com/example/project/pkg/client \
-      github.com/example/project/pkg/apis \
-      "foo:v1 bar:v1alpha1,v1beta1"
-EOF
-  exit 0
-fi
-
-GENS="$1"
-OUTPUT_PKG="$2"
-APIS_PKG="$3"
-GROUPS_WITH_VERSIONS="$4"
-shift 4
-
-echo "WARNING: $(basename "$0") is deprecated."
-echo "WARNING: Please use k8s.io/code-generator/kube_codegen.sh instead."
+echo "ERROR: $(basename "$0") has been removed."
+echo "ERROR: Please use k8s.io/code-generator/kube_codegen.sh instead."
 echo
-
-if [ "${GENS}" = "all" ] || grep -qw "all" <<<"${GENS}"; then
-    ALL="applyconfiguration,client,deepcopy,informer,lister"
-    echo "WARNING: Specifying \"all\" as a generator is deprecated."
-    echo "WARNING: Please list the specific generators needed."
-    echo "WARNING: \"all\" is now an alias for \"${ALL}\"; new code generators WILL NOT be added to this set"
-    echo
-    GENS="${ALL}"
-fi
-
-INT_APIS_PKG=""
-exec "$(dirname "${BASH_SOURCE[0]}")/generate-internal-groups.sh" "${GENS}" "${OUTPUT_PKG}" "${INT_APIS_PKG}" "${APIS_PKG}" "${GROUPS_WITH_VERSIONS}" "$@"
+exit 1
diff --git a/staging/src/k8s.io/code-generator/generate-internal-groups.sh b/staging/src/k8s.io/code-generator/generate-internal-groups.sh
index 415b0b67c64..65b0abda5a6 100755
--- a/staging/src/k8s.io/code-generator/generate-internal-groups.sh
+++ b/staging/src/k8s.io/code-generator/generate-internal-groups.sh
@@ -14,281 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -o errexit
-set -o nounset
-set -o pipefail
-
-# generate-internal-groups generates everything for a project with internal types, e.g. an
-# user-provided API server based on k8s.io/apiserver.
-
-if [ "$#" -lt 5 ] || [ "${1}" == "--help" ]; then
-  cat <<EOF
-Usage: $(basename "$0") <generators> <output-package> <internal-apis-package> <extensiona-apis-package> <groups-versions> ...
-
-  <generators>        the generators comma separated to run (applyconfiguration,client,conversion,deepcopy,defaulter,informer,lister,openapi).
-  <output-package>    the output package name (e.g. github.com/example/project/pkg/generated).
-  <int-apis-package>  the internal types dir (e.g. github.com/example/project/pkg/apis) or "" if none.
-  <ext-apis-package>  the external types dir (e.g. github.com/example/project/pkg/apis or githubcom/example/apis).
-  <groups-versions>   the groups and their versions in the format "groupA:v1,v2 groupB:v1 groupC:v2", relative
-                      to <api-package>.
-  ...                 arbitrary flags passed to all generator binaries.
-
-Example:
-  $(basename "$0") \
-      deepcopy,defaulter,conversion \
-      github.com/example/project/pkg/client \
-      github.com/example/project/pkg/apis \
-      github.com/example/project/apis \
-      "foo:v1 bar:v1alpha1,v1beta1"
-EOF
-  exit 0
-fi
-
-GENS="$1"
-OUTPUT_PKG="$2"
-INT_APIS_PKG="$3"
-EXT_APIS_PKG="$4"
-GROUPS_WITH_VERSIONS="$5"
-shift 5
-
-echo "WARNING: $(basename "$0") is deprecated."
-echo "WARNING: Please use k8s.io/code-generator/kube_codegen.sh instead."
+echo "ERROR: $(basename "$0") has been removed."
+echo "ERROR: Please use k8s.io/code-generator/kube_codegen.sh instead."
 echo
-
-# If verification only is requested, avoid deleting files
-verify_only=""
-for ((i = 1; i <= $#; i++)); do
-    if [ "${!i}" = --verify-only ]; then verify_only=1; fi
-done
-
-if [ "${GENS}" = "all" ] || grep -qw "all" <<<"${GENS}"; then
-    ALL="client,conversion,deepcopy,defaulter,informer,lister,openapi"
-    echo "WARNING: Specifying \"all\" as a generator is deprecated."
-    echo "WARNING: Please list the specific generators needed."
-    echo "WARNING: \"all\" is now an alias for \"${ALL}\"; new code generators WILL NOT be added to this set"
-    echo
-    GENS="${ALL}"
-fi
-
-(
-  # To support running this script from anywhere, first cd into this directory,
-  # and then install with forced module mode on and fully qualified name.
-  cd "$(dirname "${0}")"
-  BINS=(
-      applyconfiguration-gen
-      client-gen
-      conversion-gen
-      deepcopy-gen
-      defaulter-gen
-      informer-gen
-      lister-gen
-      openapi-gen
-  )
-  # Compile all the tools at once - it's slightly faster but also just simpler.
-  # shellcheck disable=2046 # printf word-splitting is intentional
-  GO111MODULE=on go install $(printf "k8s.io/code-generator/cmd/%s " "${BINS[@]}")
-)
-
-# Go installs the above commands to get installed in $GOBIN if defined, and $GOPATH/bin otherwise:
-GOBIN="$(go env GOBIN)"
-gobin="${GOBIN:-$(go env GOPATH)/bin}"
-
-function git_find() {
-    # Similar to find but faster and easier to understand.  We want to include
-    # modified and untracked files because this might be running against code
-    # which is not tracked by git yet.
-    git ls-files -cmo --exclude-standard "$@"
-}
-
-function git_grep() {
-    # We want to include modified and untracked files because this might be
-    # running against code which is not tracked by git yet.
-    git grep --untracked "$@"
-}
-function codegen::join() { local IFS="$1"; shift; echo "$*"; }
-
-# enumerate group versions
-ALL_FQ_APIS=() # e.g. k8s.io/kubernetes/pkg/apis/apps k8s.io/api/apps/v1
-EXT_FQ_APIS=() # e.g. k8s.io/api/apps/v1
-GROUP_VERSIONS=() # e.g. apps/v1
-for GVs in ${GROUPS_WITH_VERSIONS}; do
-  IFS=: read -r G Vs <<<"${GVs}"
-
-  if [ -n "${INT_APIS_PKG}" ]; then
-    ALL_FQ_APIS+=("${INT_APIS_PKG}/${G}")
-  fi
-
-  # enumerate versions
-  for V in ${Vs//,/ }; do
-    ALL_FQ_APIS+=("${EXT_APIS_PKG}/${G}/${V}")
-    EXT_FQ_APIS+=("${EXT_APIS_PKG}/${G}/${V}")
-    GROUP_VERSIONS+=("${G}/${V}")
-  done
-done
-
-CLIENTSET_PKG="${CLIENTSET_PKG_NAME:-clientset}"
-CLIENTSET_NAME="${CLIENTSET_NAME_VERSIONED:-versioned}"
-
-if grep -qw "deepcopy" <<<"${GENS}"; then
-  if [ ! "$verify_only" ]; then
-    # Nuke existing files
-    for dir in $(GO111MODULE=on go list -f '{{.Dir}}' "${ALL_FQ_APIS[@]}"); do
-      pushd "${dir}" >/dev/null
-      git_find -z ':(glob)**'/zz_generated.deepcopy.go | xargs -0 rm -f
-      popd >/dev/null
-    done
-  fi
-
-  echo "Generating deepcopy funcs"
-  "${gobin}/deepcopy-gen" \
-      --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" \
-      -O zz_generated.deepcopy \
-      "$@"
-fi
-
-if grep -qw "defaulter" <<<"${GENS}"; then
-  if [ ! "$verify_only" ]; then
-    # Nuke existing files
-    for dir in $(GO111MODULE=on go list -f '{{.Dir}}' "${ALL_FQ_APIS[@]}"); do
-      pushd "${dir}" >/dev/null
-      git_find -z ':(glob)**'/zz_generated.defaults.go | xargs -0 rm -f
-      popd >/dev/null
-    done
-  fi
-
-  echo "Generating defaulters"
-  "${gobin}/defaulter-gen"  \
-      --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}")" \
-      -O zz_generated.defaults \
-      "$@"
-fi
-
-if grep -qw "conversion" <<<"${GENS}"; then
-  if [ ! "$verify_only" ]; then
-    # Nuke existing files
-    for dir in $(GO111MODULE=on go list -f '{{.Dir}}' "${ALL_FQ_APIS[@]}"); do
-      pushd "${dir}" >/dev/null
-      git_find -z ':(glob)**'/zz_generated.conversion.go | xargs -0 rm -f
-      popd >/dev/null
-    done
-  fi
-
-  echo "Generating conversions"
-  "${gobin}/conversion-gen" \
-      --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" \
-      -O zz_generated.conversion \
-      "$@"
-fi
-
-if grep -qw "applyconfiguration" <<<"${GENS}"; then
-  APPLY_CONFIGURATION_PACKAGE="${OUTPUT_PKG}/${APPLYCONFIGURATION_PKG_NAME:-applyconfiguration}"
-
-  if [ ! "$verify_only" ]; then
-    # Nuke existing files
-    root="$(GO111MODULE=on go list -f '{{.Dir}}' "${APPLY_CONFIGURATION_PACKAGE}" 2>/dev/null || true)"
-    if [ -n "${root}" ]; then
-      pushd "${root}" >/dev/null
-      git_grep -l --null \
-        -e '^// Code generated by applyconfiguration-gen. DO NOT EDIT.$' \
-        ':(glob)**/*.go' \
-        | xargs -0 rm -f
-      popd >/dev/null
-    fi
-  fi
-
-  echo "Generating apply configuration for ${GROUPS_WITH_VERSIONS} at ${APPLY_CONFIGURATION_PACKAGE}"
-  "${gobin}/applyconfiguration-gen" \
-      --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}")" \
-      --output-package "${APPLY_CONFIGURATION_PACKAGE}" \
-      "$@"
-fi
-
-if grep -qw "client" <<<"${GENS}"; then
-  if [ ! "$verify_only" ]; then
-    # Nuke existing files
-    root="$(GO111MODULE=on go list -f '{{.Dir}}' "${OUTPUT_PKG}/${CLIENTSET_PKG}/${CLIENTSET_NAME}" 2>/dev/null || true)"
-    if [ -n "${root}" ]; then
-      pushd "${root}" >/dev/null
-      git_grep -l --null \
-        -e '^// Code generated by client-gen. DO NOT EDIT.$' \
-        ':(glob)**/*.go' \
-        | xargs -0 rm -f
-      popd >/dev/null
-    fi
-  fi
-
-  echo "Generating clientset for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/${CLIENTSET_PKG}"
-  "${gobin}/client-gen" \
-      --clientset-name "${CLIENTSET_NAME}" \
-      --input-base "" \
-      --input "$(codegen::join , "${EXT_FQ_APIS[@]}")" \
-      --output-package "${OUTPUT_PKG}/${CLIENTSET_PKG}" \
-      --apply-configuration-package "${APPLY_CONFIGURATION_PACKAGE:-}" \
-      "$@"
-fi
-
-if grep -qw "lister" <<<"${GENS}"; then
-  if [ ! "$verify_only" ]; then
-    # Nuke existing files
-    for gv in "${GROUP_VERSIONS[@]}"; do
-      root="$(GO111MODULE=on go list -f '{{.Dir}}' "${OUTPUT_PKG}/listers/${gv}" 2>/dev/null || true)"
-      if [ -n "${root}" ]; then
-        pushd "${root}" >/dev/null
-        git_grep -l --null \
-          -e '^// Code generated by lister-gen. DO NOT EDIT.$' \
-          ':(glob)**/*.go' \
-          | xargs -0 rm -f
-        popd >/dev/null
-      fi
-    done
-  fi
-
-  echo "Generating listers for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/listers"
-  "${gobin}/lister-gen" \
-      --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}")" \
-      --output-package "${OUTPUT_PKG}/listers" \
-      "$@"
-fi
-
-if grep -qw "informer" <<<"${GENS}"; then
-  if [ ! "$verify_only" ]; then
-    # Nuke existing files
-    root="$(GO111MODULE=on go list -f '{{.Dir}}' "${OUTPUT_PKG}/informers/externalversions" 2>/dev/null || true)"
-    if [ -n "${root}" ]; then
-      pushd "${root}" >/dev/null
-      git_grep -l --null \
-        -e '^// Code generated by informer-gen. DO NOT EDIT.$' \
-        ':(glob)**/*.go' \
-        | xargs -0 rm -f
-      popd >/dev/null
-    fi
-  fi
-
-  echo "Generating informers for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/informers"
-  "${gobin}/informer-gen" \
-      --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}")" \
-      --versioned-clientset-package "${OUTPUT_PKG}/${CLIENTSET_PKG}/${CLIENTSET_NAME}" \
-      --listers-package "${OUTPUT_PKG}/listers" \
-      --output-package "${OUTPUT_PKG}/informers" \
-      "$@"
-fi
-
-if grep -qw "openapi" <<<"${GENS}"; then
-  if [ ! "$verify_only" ]; then
-    # Nuke existing files
-    for dir in $(GO111MODULE=on go list -f '{{.Dir}}' "${FQ_APIS[@]}"); do
-      pushd "${dir}" >/dev/null
-      git_find -z ':(glob)**'/zz_generated.openapi.go | xargs -0 rm -f
-      popd >/dev/null
-    done
-  fi
-
-  echo "Generating OpenAPI definitions for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/openapi"
-  declare -a OPENAPI_EXTRA_PACKAGES
-  "${gobin}/openapi-gen" \
-      --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}" "${OPENAPI_EXTRA_PACKAGES[@]+"${OPENAPI_EXTRA_PACKAGES[@]}"}")" \
-      --input-dirs "k8s.io/apimachinery/pkg/apis/meta/v1,k8s.io/apimachinery/pkg/runtime,k8s.io/apimachinery/pkg/version" \
-      --output-package "${OUTPUT_PKG}/openapi" \
-      -O zz_generated.openapi \
-      "$@"
-fi
+exit 1