code: def delete_network(self, name, tenant_id, subnet_id, net_id):
          
          try:
              self.neutronclient.delete_subnet(subnet_id)
          except Exception as exc:
              LOG.error("Failed to delete subnet %(sub)s exc %(exc)s",
                        {'sub': subnet_id, 'exc': str(exc)})
              return
          try:
              self.neutronclient.delete_network(net_id)
          except Exception as exc:
              LOG.error("Failed to delete network %(name)s exc %(exc)s",
                        {'name': name, 'exc': str(exc)})
docs: Delete the openstack subnet and network.