message: Tweak comment about identity optimization
diff: @@ -2470,7 +2470,7 @@ bool ConstantFolding::IsReductionSimplifiableToIdentity(
  bool ConstantFolding::ReplaceReductionWithIdentity(NodeDef* node) const {
  // Replace the reduction node with an identity node, that can be further
  - // optimized by the model pruner.
  + // optimized by other passes.
  DataType output_type;
  if (node->attr().count("T") != 0) {
  output_type = node->attr().at("T").type();
  