Remove require once statment and rely on autoloader

src/UNL/Catalog.php

@@ -484,9 +484,6 @@ class UNL_Catalog
      */
     private function initializeTemplate()
     {
-        if (!class_exists('UNL_Templates')) {
-            require_once 'UNL/Templates.php';
-        }
         UNL_Templates::setCachingService(new UNL_Templates_CachingService_Null());
 
         UNL_Templates::$options['version'] = 3.1;