Remove non-working cleanup

This cleanup call simply fails with a warning because the database isn't
available, so just remove it.

Author: jagerman

contrib/upgrade-tests/common.sh

@@ -102,7 +102,4 @@ do_upgrades() {
     # This should exit cleanly to indicate no needed migrations (if it doesn't, i.e. we still
     # require migrations after doing a migration then Something Getting Wrong in migrations).
     python3 -msogs --check-upgrades
-
-    # Run the cleanup job to make sure we have the proper rooms.active_users values
-    python3 -c 'from sogs.cleanup import cleanup; cleanup()'
 }