message: #codehealth Remove redundant config_ update
  This is no-op change because Reload() method will soon update config_.
  By this change, SessionHandler's config_ is updated only by SetConfig() method.
  We'll able to consolidate config-update related logic into SetConfig().
diff: @@ -459,8 +459,7 @@ void SessionHandler::MaybeUpdateStoredConfig(commands::Command *command) {
  return;
  }
  - *config_ = command->output().config();
  - config::ConfigHandler::SetConfig(*config_);
  + config::ConfigHandler::SetConfig(command->output().config());
  Reload(command);
  }
  