message: remove spurious comment
diff: @@ -522,7 +522,7 @@ int command(int argc, const char *argv[]) {
  return_code = stan::services::diagnose::diagnose(
  model, *(init_contexts[0]), random_seed, id, init_radius, epsilon,
  error, interrupt, logger, init_writers[0], sample_writers[0]);
  - } // no other option than "gradient" - wtf?
  + }
  //////////////////////////////////////////////////
  } else if (user_method->arg("optimize")) {
  int num_iterations
  