message: Avoid generating the _output_shape attribute in constant folding since the can
  really bloat the graphs
diff: @@ -332,12 +332,6 @@ NodeDef ConstantFolding::CreateNodeDef(const string& name,
  NodeDef node;
  node.set_name(name);
  node.set_op("Const");
  - AttrValue attr_output_shape;
  - auto output_shape = attr_output_shape.mutable_list()->add_shape();
  - TensorShapeProto shape;
  - tensor->shape().AsProto(&shape);
  - *output_shape = shape;
  - node.mutable_attr()->insert({"_output_shapes", attr_output_shape});
  AttrValue attr_type;
  attr_type.set_type(tensor->dtype());
  