src: remove unreachable UNREACHABLE
All paths leading up to this last UNREACHABLE either return or abort. (If they did not, the compiler would at least emit a warning.)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
All paths leading up to this last UNREACHABLE either return or abort. (If they did not, the compiler would at least emit a warning.)