MegaHAL: we don't need to sync the brain in shutdown(), since we sync it in save()

modules/MegaHAL.py

@@ -53,10 +53,6 @@ class MegaHAL(Module):
         """Sync the megahal brain."""
         mh_python.cleanup()
 
-    def shutdown(self):
-        """Sync the megahal brain."""
-        mh_python.cleanup()
-
     def learn_from_irc_event(self, connection, event):
         """Learn text when an irc event happens."""
         what = ''.join(event.arguments()[0])