Temporary revert GPG feature for semver based retagging (#373)

Feature #343 happens to be a breaking change when enabling `.Values.signing` but not specifying
any of the new private key properties. Tag `v6.0.2` is therefore not following semantic versioning.

This temporarily reverts commit b8f0310c43 and a fix-up commit 57a1cd27d9
to retag 6.0.2 as 6.0.3.

Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/373
Reviewed-by: techknowlogick <techknowlogick@gitea.io>
Reviewed-by: luhahn <luhahn@noreply.gitea.io>

templates/gitea/init.yaml

@@ -6,11 +6,6 @@ metadata:
     {{- include "gitea.labels" . | nindent 4 }}
 type: Opaque
 stringData:
-  configure_gpg_environment.sh: |-
-    #!/usr/bin/env bash
-    set -eu
-
-    gpg --batch --import /raw/private.asc
   init_directory_structure.sh: |-
     #!/usr/bin/env bash
 
@@ -40,14 +35,6 @@ stringData:
     {{- end }}
     chmod ug+rwx "${GITEA_TEMP}"
 
-    {{ if .Values.signing.enabled -}}
-    if [ ! -d "${GNUPGHOME}" ]; then
-      mkdir -p "${GNUPGHOME}"
-      chmod 700 "${GNUPGHOME}"
-      chown 1000:1000 "${GNUPGHOME}"
-    fi
-    {{- end }}
-
   configure_gitea.sh: |-
     #!/usr/bin/env bash