diff --git a/library/smarty/libs/plugins/modifiercompiler.lower.php b/library/smarty/libs/plugins/modifiercompiler.lower.php
deleted file mode 100644
--- a/library/smarty/libs/plugins/modifiercompiler.lower.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php
-/**
- * Smarty plugin
- *
- * @package    Smarty
- * @subpackage PluginsModifierCompiler
- */
-
-/**
- * Smarty lower modifier plugin
- * Type:     modifier<br>
- * Name:     lower<br>
- * Purpose:  convert string to lowercase
- *
- * @link   http://www.smarty.net/manual/en/language.modifier.lower.php lower (Smarty online manual)
- * @author Monte Ohrt <monte at ohrt dot com>
- * @author Uwe Tews
- *
- * @param array $params parameters
- *
- * @return string with compiled code
- */
-
-function smarty_modifiercompiler_lower($params) {
-    if (Smarty::$_MBSTRING) {
-        return 'mb_strtolower(' . $params[0] . ', \'' . addslashes(Smarty::$_CHARSET) . '\')';
-    }
-    // no MBString fallback
-    return 'strtolower(' . $params[0] . ')';
-}