docs: def delete_tenant_if_removed(self, tenant_id):
          """Enqueue tenant delete if it's no longer in the db"""
          if not db_lib.tenant_provisioned(tenant_id):
              t_res = MechResource(tenant_id, a_const.TENANT_RESOURCE,
                                   a_const.DELETE)
              self.provision_queue.put(t_res)