message: Remove unnecessary for loop
diff: @@ -236,11 +236,7 @@ tensorflow::Status TRTOptimizationPass::Optimize(
  std::vector<string> nodes_to_preserve;
  for (const auto& n : item.NodesToPreserve()) {
  auto tokens = str_util::Split(n, ":");
  - string s = tokens.at(0);
  - for (size_t t = 1; t < tokens.size() - 1; ++t) {
  - StrAppend(&s, ":", tokens.at(t));
  - }
  - nodes_to_preserve.push_back(s);
  + nodes_to_preserve.push_back(tokens.at(0));
  }
  cp.input_graph_def = &item.graph;
  cp.output_names = &nodes_to_preserve;
  