def delete_subnet_group(self, subnet_name):
        if subnet_name in self.subnet_groups:
            return self.subnet_groups.pop(subnet_name)
        else:
            raise DBSubnetGroupNotFoundError(subnet_name)
dataset/ETHPy150Open spulec/moto/moto/rds/models.py/RDSBackend.delete_subnet_group/original