Removing left-over from drupal_set_title() roll-back.

includes/common.inc

@@ -24,27 +24,6 @@ define('SAVED_UPDATED', 2);
  */
 define('SAVED_DELETED', 3);
 
-/**
- * @name Title text filtering flags
- * @{
- * Flags for use in drupal_set_title().
- */
-
-/**
- * Flag for drupal_set_title(); text is not sanitized, so run check_plain().
- */
-define('CHECK_PLAIN', 0);
-
-/**
- * Flag for drupal_set_title(); text has already been sanitized.
- */
-define('PASS_THROUGH', -1);
-
-/**
- * @} End of "Title text filtering flags".
- */
-
-
 /**
  * Set content for a specified region.
  *