message: Convert LOG(INFO) to VLOG in `AutoShard` optimizer.
diff: @@ -446,7 +446,7 @@ Status AutoShard::OptimizeAndCollectStats(Cluster* /* cluster */,
  GraphDef* output,
  OptimizationStats* stats) {
  *output = item.graph;
  - LOG(INFO) << "auto_shard";
  + VLOG(2) << "auto_shard";
  TF_RETURN_IF_ERROR(OptimizeGraph(item, num_workers_, index_, output));
  stats->num_changes++;
  return Status::OK();
  