code: def xray_driver_removed_handler(self, unused_channel, data):
          
          gcs_entries = ray.gcs_utils.GcsTableEntry.GetRootAsGcsTableEntry(
              data, 0)
          driver_data = gcs_entries.Entries(0)
          message = ray.gcs_utils.DriverTableData.GetRootAsDriverTableData(
              driver_data, 0)
          driver_id = message.DriverId()
          logger.info("Monitor: "
                      "XRay Driver {} has been removed.".format(
                          binary_to_hex(driver_id)))
          self._xray_clean_up_entries_for_driver(driver_id)
docs: Handle a notification that a driver has been removed.
  
          Args:
              unused_channel: The message channel.
              data: The message data.