Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 18407)
+++ wp-admin/includes/schema.php	(working copy)
@@ -615,7 +615,6 @@
 		$role->add_cap( 'update_core' );
 		$role->add_cap( 'list_users' );
 		$role->add_cap( 'remove_users' );
-		$role->add_cap( 'add_users' );
 		$role->add_cap( 'promote_users' );
 		$role->add_cap( 'edit_theme_options' );
 		$role->add_cap( 'delete_themes' );