[gtk+] Drop PANGO_ENABLE_BACKEND

[Matthias Clasen <matthiasc src gnome org>]

commit ff558d3d392f5e0b7e50a0b7cd451100826b31a9
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon May 4 08:01:36 2015 -0400

    Drop PANGO_ENABLE_BACKEND
    
    Not needed for a long time now.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=748783

 gtk/gtksettings.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtksettings.c b/gtk/gtksettings.c
index 3c9d037..a23730f 100644
--- a/gtk/gtksettings.c
+++ b/gtk/gtksettings.c
@@ -16,8 +16,6 @@
  */
 
 
-#define PANGO_ENABLE_BACKEND /* for pango_fc_font_map_cache_clear() */
-
 #include "config.h"
 
 #include <string.h>