Update: Don't double-call flatpak_dir_cleanup_removed

This is already called automatically from flatpak_dir_deploy_update.
In particular, in the system-installed case this will cause
a warning due to not being able to remove the old checkout with
permission denied.

app/flatpak-builtins-update.c

@@ -299,8 +299,6 @@ flatpak_builtin_update (int           argc,
       return FALSE;
     }
 
-  flatpak_dir_cleanup_removed (dir, cancellable, NULL);
-
   if (failed)
     return flatpak_fail (error, _("One or more updates failed"));