Merge pull request #854 from forslund/gregmccoy-feature/issue-788

Gregmccoy feature/issue 788

Author: forslund

mycroft/messagebus/client/ws.py

@@ -100,6 +100,17 @@ def once(self, event_name, func):
     def remove(self, event_name, func):
         self.emitter.remove_listener(event_name, func)
 
+    def remove_all_listeners(self, event_name):
+        '''
+            Remove all listeners connected to event_name.
+
+            Args:
+                event_name: event from which to remove listeners
+        '''
+        if event_name is None:
+            raise ValueError
+        self.emitter.remove_all_listeners(event_name)
+
     def run_forever(self):
         self.client.run_forever()