message: [XLA] Don't print "{no layout}" if there is no layout.
diff: @@ -475,8 +475,6 @@ StatusOr<PrimitiveType> StringToPrimitiveType(const string& name) {
  if (LayoutUtil::HasLayout(shape)) {
  tensorflow::strings::StrAppend(&result,
  LayoutUtil::HumanString(shape.layout()));
  - } else {
  - tensorflow::strings::StrAppend(&result, "{no layout}");
  }
  }
  return result;
  