EmailTemplatesListPanel.inc.php

<?php
namespace APP\components\listPanels;
use \PKP\components\listPanels\PKPEmailTemplatesListPanel;
 
class EmailTemplatesListPanel extends PKPEmailTemplatesListPanel {
   public function getConfig() {
      $config = parent::getConfig();
      $filterByStageKey = count($config['filters']) - 1;
      unset($config['filters'][$filterByStageKey]['filters'][1]); // remove internal review stage
      $config['filters'][$filterByStageKey]['filters'][2]['title'] = __('manager.publication.reviewStage');
 
      return $config;
   }
}