Fix migration for removing MR diff indexes
This should take care of all the shenanigans as discussed in https://gitlab.com/gitlab-org/gitlab-ce/issues/22136.
cc @stanhu
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This should take care of all the shenanigans as discussed in https://gitlab.com/gitlab-org/gitlab-ce/issues/22136.
cc @stanhu