message: Fix unused status error in convert_graph.cc
diff: @@ -168,7 +168,7 @@ tensorflow::Status ConvertCalibGraphToInferGraph(
  "Can't get TRTCalibrator from resource manager!");
  }
  cres->Unref();
  - calib_rm->Cleanup(container_name);
  + TF_RETURN_IF_ERROR(calib_rm->Cleanup(container_name));
  }
  }
  return tensorflow::Status::OK();
  