[gtk+] Drop unneeded deprecation suppression

[Matthias Clasen <matthiasc src gnome org>]

commit f66e239fe424d58e1c748f028087a96a941846df
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri May 2 18:50:52 2014 -0400

    Drop unneeded deprecation suppression
    
    Removing this did not produce any deprecation warnings.

 gdk/gdk.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gdk/gdk.c b/gdk/gdk.c
index 99ad126..fd64c83 100644
--- a/gdk/gdk.c
+++ b/gdk/gdk.c
@@ -24,8 +24,6 @@
 
 #include "config.h"
 
-#define GDK_DISABLE_DEPRECATION_WARNINGS 1
-
 #include "gdkversionmacros.h"
 #include "gdkmain.h"