def delete_vpcid_for_switch(vpc_id, switch_ip):
LOG.debug("<STR_LIT>")<EOL>session = bc.get_writer_session()<EOL>vpc = _lookup_one_vpc_allocs(vpc_id=vpc_id,<EOL>switch_ip=switch_ip,<EOL>active=False)<EOL>session.delete(vpc)<EOL>session.flush()<EOL>
Removes unused vpcid for a switch.

    :param vpc_id: vpc id to remove
    :param switch_ip: ip address of the switch