Remove non-existent method binding
This MR fixes rspec failure (https://dev.gitlab.org/gitlab/gitlabhq/builds/1114209) that occurred after picking !11327 (merged) into 9-2-stable.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This MR fixes rspec failure (https://dev.gitlab.org/gitlab/gitlabhq/builds/1114209) that occurred after picking !11327 (merged) into 9-2-stable.