code: def delete_os_in_nwk(self, tenant_id, fw_dict, is_fw_virt=False):
          
          ret = True
          tenant_name = fw_dict.get('tenant_name')
          try:
              ret = self._delete_os_nwk(tenant_id, tenant_name, "in",
                                        is_fw_virt=is_fw_virt)
          except Exception as exc:
              LOG.error("Deletion of In Openstack Network failed tenant "
                        "%(tenant)s Exception %(exc)s",
                        {'tenant': tenant_id, 'exc': str(exc)})
              ret = False
          # Updating the FW DB
          if ret:
              res = fw_const.OS_IN_NETWORK_DEL_SUCCESS
          else:
              res = fw_const.OS_IN_NETWORK_DEL_FAIL
          self.update_fw_db_result(tenant_id, os_status=res)
          return ret
docs: Deletes the Openstack In network and update the DB.