def remove_handler(self, handler: Handler, group: int = 0):
        """Removes a previously-added update handler.

        Make sure to provide the right group that the handler was added in. You can use
        the return value of the :meth:`add_handler` method, a tuple of (handler, group), and
        pass it directly.

        Args:
            handler (``Handler``):
                The handler to be removed.

            group (``int``, *optional*):
                The group identifier, defaults to 0.
        """
        if isinstance(handler, DisconnectHandler):
            self.disconnect_handler = None
        else:
            self.dispatcher.remove_handler(handler, group)