message: Remove superfluous line (repeat of line 163)
diff: @@ -138,7 +138,6 @@ class MapDatasetOp : public UnaryDatasetOpKernel {
  Status AsGraphDefInternal(SerializationContext* ctx,
  DatasetGraphDefBuilder* b,
  Node** output) const override {
  - TF_RETURN_IF_ERROR(b->AddFunction(ctx, func_.name()));
  Node* input_graph_node = nullptr;
  TF_RETURN_IF_ERROR(b->AddInputDataset(ctx, input_, &input_graph_node));
  