Removes any links to given `vrf_table`.

def _remove_links_to_vrf_table(self, vrf_table):
        """Removes any links to given `vrf_table`."""
        assert vrf_table
        vrf_conf = vrf_table.vrf_conf
        self._remove_links_to_vrf_table_for_rts(vrf_table,
                                                vrf_conf.import_rts)