code: def remove_listener(self, event, listener):
          
          with contextlib.suppress(ValueError):
  
              self._listeners[event].remove(listener)
              return True
  
          with contextlib.suppress(ValueError):
  
              self._once[event].remove(listener)
              return True
  
          return False
docs: Remove a listener from the emitter.
  
          Args:
              event (str): The event name on which the listener is bound.
              listener: A reference to the same object given to add_listener.
  
          Returns:
              bool: True if a listener was removed else False.
  
          This method only removes one listener at a time. If a listener is
          attached multiple times then this method must be called repeatedly.
          Additionally, this method removes listeners first from the those
          registered with 'on' or 'add_listener'. If none are found it continue
          to remove afterwards from those added with 'once'.