message: Do not set 5th output in CombinedNMSShapeFn
  We already removed the 5th output from the op definition. This part
  was missed.
diff: @@ -192,7 +192,6 @@ Status CombinedNMSShapeFn(InferenceContext* c) {
  c->set_output(1, c->MakeShape({batch_dim, output_size}));
  c->set_output(2, c->MakeShape({batch_dim, output_size}));
  c->set_output(3, c->Vector(batch_dim));
  - c->set_output(4, c->MakeShape({batch_dim, output_size}));
  return Status::OK();
  }
  