message: remove debugging logging
diff: @@ -715,8 +715,6 @@ void Puzzle() {
  // model's suggested move to the actual move played in the game.
  for (size_t move_to_predict = 0; move_to_predict < moves.size();
  ++move_to_predict) {
  - std::cerr << absl::StrCat(move_to_predict, "/", moves.size(), "\n");
  -
  // Reset the game and play up to the position to be tested.
  player->NewGame();
  for (size_t i = 0; i < move_to_predict; ++i) {
  