Delete `Projects::IssuesController#redirect_old`
It looks like this was meant to be removed in 7.0, but it's stuck around. I think we can safely call this deprecated by 9.0.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
It looks like this was meant to be removed in 7.0, but it's stuck around. I think we can safely call this deprecated by 9.0.