https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21679 moved the
deletion of registry tags outside of a transaction, but introduced an
issue where Sidekiq would attempt to contact the container registry
during project destruction even if it were disabled.

Relates to:

* https://gitlab.com/charts/gitlab/issues/1455
* https://gitlab.com/gitlab-org/gitlab-ce/issues/45941