[Core] Remove usage of deprecated torrent status.paused

Noticed mismatch with current lt docs and found usage of deprecated
status.paused.

The actual check here is not required we should just attempt to pause
the torrent.

Issue: https://dev.deluge-torrent.org/ticket/3499

deluge/core/torrentmanager.py

@@ -290,8 +290,8 @@ def update(self):
                     if torrent.options['remove_at_ratio']:
                         self.remove(torrent_id)
                         break
-                    if not torrent.status.paused:
-                        torrent.pause()
+
+                    torrent.pause()
 
     def __getitem__(self, torrent_id):
         """Return the Torrent with torrent_id.