'Remove an IP allocation for this subnet.
:param context: neutron api request context
:param ip_address: IP address for which the allocation entry should
be removed.
:returns: number of deleted allocation entries.'

def delete_allocation(self, context, ip_address):

    return ipam_objs.IpamAllocation.delete_objects(context, ipam_subnet_id=self._ipam_subnet_id, ip_address=ip_address)
