Remove unsplit element classes and pseudo-classes

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=687465
Reviewed-by: Jasper St. Pierre <jstpierre@mecheye.net>

src/st/st-theme-node-private.h

@@ -77,9 +77,7 @@ struct _StThemeNode {
 
   GType element_type;
   char *element_id;
-  char *element_class;
   GStrv element_classes;
-  char *pseudo_class;
   GStrv pseudo_classes;
   char *inline_style;