[gtk+] gdk: Remove nonexisting function from internal header

[Benjamin Otte <otte src gnome org>]

commit 5f4e0d33f10fa2e56d15567ebbf35b70a6db0c42
Author: Benjamin Otte <otte redhat com>
Date:   Wed Nov 1 18:17:55 2017 +0100

    gdk: Remove nonexisting function from internal header

 gdk/gdkinternals.h |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/gdk/gdkinternals.h b/gdk/gdkinternals.h
index 20c4def..06d1fa7 100644
--- a/gdk/gdkinternals.h
+++ b/gdk/gdkinternals.h
@@ -394,9 +394,6 @@ void       _gdk_window_process_updates_recurse (GdkWindow *window,
 
 void       _gdk_screen_close             (GdkScreen      *screen);
 
-GdkWindow *gdk_get_default_root_window (void);
-
-
 /*****************************************
  * Interfaces provided by windowing code *
  *****************************************/