def register_for_deleted_relationships_for_peer(self, peer_id=None):
pass<EOL>
Register for notifications of deleted relationships.

        ``RelationshipReceiver.deletedRelationship()`` is invoked when a
        ``Relationship`` if removed for the given peer.

        arg:    peer_id (osid.id.Id): the ``Id`` of a peer to monitor
        raise:  NullArgument - ``peer_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*