diff --git a/js/xpconnect/loader/XPCOMUtils.jsm b/js/xpconnect/loader/XPCOMUtils.jsm
index 4f0b79ad73c2..a63cf038e45a 100644
--- a/js/xpconnect/loader/XPCOMUtils.jsm
+++ b/js/xpconnect/loader/XPCOMUtils.jsm
@@ -408,16 +408,6 @@ var XPCOMUtils = {
     });
   },
 
-  /**
-   * Helper which iterates over a nsISimpleEnumerator.
-   * @param e The nsISimpleEnumerator to iterate over.
-   * @param i The expected interface for each element.
-   */
-  IterSimpleEnumerator: function XPCU_IterSimpleEnumerator(e, i)
-  {
-    return e.entries(i);
-  },
-
   /**
    * Helper which iterates over a string enumerator.
    * @param e The string enumerator (nsIUTF8StringEnumerator or