diff --git a/modules/system/html.tpl.php b/modules/system/html.tpl.php
index de56db1..d889b23 100644
--- a/modules/system/html.tpl.php
+++ b/modules/system/html.tpl.php
@@ -11,8 +11,6 @@
  *   $language->language contains its textual representation.
  *   $language->dir contains the language direction.
  *   It will either be 'ltr' or 'rtl'.
- * - $rdf_namespaces: All the RDF namespace prefixes used in the HTML document.
- * - $grddl_profile: A GRDDL profile allowing agents to extract the RDF data.
  * - $head_title: A modified version of the page title, for use in the TITLE
  *   tag.
  * - $head_title_array: (array) An associative array containing the string parts