code: def _fw_delete(self, drvr_name, data):
          
          fw_id = data.get('firewall_id')
          tenant_id = self.tenant_db.get_fw_tenant(fw_id)
  
          if tenant_id not in self.fwid_attr:
              LOG.error("Invalid tenant id for FW delete %s", tenant_id)
              return
  
          tenant_obj = self.fwid_attr[tenant_id]
          ret = self._check_delete_fw(tenant_id, drvr_name)
          if ret:
              tenant_obj.delete_fw(fw_id)
              self.tenant_db.del_fw_tenant(fw_id)
docs: Firewall Delete routine.
  
          This function calls routines to remove FW from fabric and device.
          It also updates its local cache.