docs: def delete_port_if_removed(self, port):
          """Enqueue port delete"""
          instance_type = self.get_instance_type(port)
          if not instance_type:
              return
          port_type = instance_type + a_const.PORT_SUFFIX
          if not db_lib.port_provisioned(port['id']):
              p_res = MechResource(port['id'], port_type, a_const.DELETE)
              self.provision_queue.put(p_res)