[I18N] make merge-locales & build/merge-forgejo-locales.go are noop
Instead of failing or do things that could be damaging, this script
prints a deprecation notice. It fixes the unnecessary breaking
change introduced in `[I18n] tooling and process`.
https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/version-management/forgejo/default.nix#L80
$ make merge-locales
NOT NEEDED: THIS IS A NOOP AS OF Forgejo 7.0 BUT KEPT FOR BACKWARD COMPATIBILITY
$ go run build/merge-forgejo-locales.go
NOT NEEDED: THIS IS A NOOP AS OF Forgejo 7.0 BUT KEPT FOR BACKWARD COMPATIBILITY
Also remove the build/crowdin-to-weblate.sh script that was never
needed.