'Clean up a deleted tunnel port.
This method is assumed to be used by method fdb_remove_tun.
We expect to clean up after calling del_fdb_flow. It will be mainly
deleting a port from a bridge.
If you need, you may do some cleanup for a bridge.
:param br: represent the bridge on which cleanup_tunnel_port should be
applied.
:param tun_ofport: a port value to cleanup.
:param tunnel_type: a type of a tunnel.'

@abc.abstractmethod
def cleanup_tunnel_port(self, br, tun_ofport, tunnel_type):

    pass
