Cleanup old ghtorrent scheduler services
There is some service not used anymore installed on the scheduler host and not used (and not working anymore triggering a monitoring alert if restarted).
They are not managed by puppet and should be manually deleted:
- swh-scheduler-updater-consumer-ghtorrent.service
- swh-scheduler-updater-writer.service
- swh-scheduler-updater-writer.timer
- ssh-ghtorrent.service
Migrated from T3777 (view on Phabricator)