MDL-12093 - remove added classes - they don't help the issue and clutter the code

lib/weblib.php

@@ -2577,16 +2577,6 @@ function print_header ($title='', $heading='', $navigation='', $focus='',
         $pageclass .= ' drag';
     }
 
-    /* give pages without heading or navigation special classes, to
-     * allow theming of very simple windows (popups and others) */
-    if ($heading == '') {
-        $pageclass .= ' noheader';
-    }
-
-    if ($navigation == '') {
-        $pageclass .= ' nonavigation';
-    }
-
     $pageclass .= ' dir-'.get_string('thisdirection');
 
     $pageclass .= ' lang-'.$currentlanguage;