gitlab: remove DB migration warning

This is a bit annoying as it still appears after doing the upgrade.
We didn't experience the problem on any Gitlab instance, yet.

nixos/modules/services/misc/gitlab.nix

@@ -1110,11 +1110,6 @@ in {
         ''Support for container registries other than gitlab-container-registry has ended since GitLab 16.0.0 and is scheduled for removal in a future release.
           Please back up your data and migrate to the gitlab-container-registry package.''
       )
-      (mkIf
-        (versionAtLeast (getVersion cfg.packages.gitlab) "16.2.0" && versionOlder (getVersion cfg.packages.gitlab) "16.5.0")
-        ''GitLab instances created or updated between versions [15.11.0, 15.11.2] have an incorrect database schema.
-        Check the upstream documentation for a workaround: https://docs.gitlab.com/ee/update/versions/gitlab_16_changes.html#undefined-column-error-upgrading-to-162-or-later''
-      )
     ];
 
     assertions = [