Fixes #23614#23616 - Remove katello-backup and katello-restore.
Katello-backup and katello-restore have moved to foreman-maintain. The commands in foreman-maintain support remote databases and mongo 3.4. Since katello-backup and katello-restore do not support these features, we have to remove them in Katello 3.7 (unfortunately without deprecation)
Fixes #23614 #23616 - Remove katello-backup and katello-restore.
Katello-backup and katello-restore have moved to foreman-maintain. The commands
in foreman-maintain support remote databases and mongo 3.4. Since katello-backup
and katello-restore do not support these features, we have to remove them in
Katello 3.7 (unfortunately without deprecation)