Remove unused unEscape() method

program/include/rcube_imap_generic.php

@@ -3657,18 +3657,6 @@ class rcube_imap_generic
         return sprintf("{%d}\r\n%s", strlen($string), $string);
     }
 
-    /**
-     * Unescapes quoted-string
-     *
-     * @param string  $string       IMAP string
-     *
-     * @return string String
-     */
-    static function unEscape($string)
-    {
-        return stripslashes($string);
-    }
-
     /**
      * Set the value of the debugging flag.
      *