Drop membership to multicast

        :rtype: None

def _drop_membership_multicast_socket(self):
        """
        Drop membership to multicast

        :rtype: None
        """
        # Leave group
        self._multicast_socket.setsockopt(
            socket.IPPROTO_IP,
            socket.IP_DROP_MEMBERSHIP,
            self._membership_request
        )
        self._membership_request = None