Revert "Hack to check for live tv stopped websocket event"

This reverts commit 1245b4fbd3.

plexpy/activity_handler.py

@@ -43,9 +43,6 @@ class ActivityHandler(object):
         if 'sessionKey' in self.timeline:
             if str(self.timeline['sessionKey']).isdigit():
                 return True
-        # Hack since sessionKey is not in the live TV stopped event
-        elif self.timeline.get('key', '').startswith('/livetv/sessions') and self.timeline.get('state') == 'stopped':
-            return True
 
         return False