<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def remove_listener(self, callback):
 """ Remove a listener. """

        listeners = filter(lambda x: x['callback'] == callback, self.listeners)
        for l in listeners:
            self.listeners.remove(l)