diff --git a/library/smarty/libs/plugins/modifiercompiler.cat.php b/library/smarty/libs/plugins/modifiercompiler.cat.php
deleted file mode 100644
--- a/library/smarty/libs/plugins/modifiercompiler.cat.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-/**
- * Smarty plugin
- *
- * @package    Smarty
- * @subpackage PluginsModifierCompiler
- */
-
-/**
- * Smarty cat modifier plugin
- * Type:     modifier<br>
- * Name:     cat<br>
- * Date:     Feb 24, 2003<br>
- * Purpose:  catenate a value to a variable<br>
- * Input:    string to catenate<br>
- * Example:  {$var|cat:"foo"}
- *
- * @link     http://smarty.php.net/manual/en/language.modifier.cat.php cat
- *           (Smarty online manual)
- * @author   Uwe Tews
- *
- * @param array $params parameters
- *
- * @return string with compiled code
- */
-function smarty_modifiercompiler_cat($params) {
-    return '(' . implode(').(', $params) . ')';
-}