(Cleanup Legacy Storage): Remove move_repositories call in legacy namespace
This is a cleanup issue for when we no longer have the Legacy Storage.
Once #33730 (closed) is fixed, https://gitlab.com/gitlab-org/gitlab/blob/master/app%2Fmodels%2Fconcerns%2Fstorage%2Flegacy_namespace.rb#L20 is no longer needed since everything will be on hashed storage.
Let's remove both legacy_namespace.rb
, as well as the Gitlab::GitalyClient::NamespaceService
altogether, since it will be dead code once legacy_namespace.rb
no longe exists.
These two changes can likely be part of the same MR in separate commits.