[gtk+] Fix the build

[Matthias Clasen <matthiasc src gnome org>]

commit 34fa61e13cdffc0541a14eca1825c2bfd5ea70f5
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Nov 17 13:12:51 2017 -0500

    Fix the build

 gdk/x11/meson.build |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gdk/x11/meson.build b/gdk/x11/meson.build
index 4afc1cb..526329f 100644
--- a/gdk/x11/meson.build
+++ b/gdk/x11/meson.build
@@ -46,7 +46,6 @@ gdk_x11_public_headers = files([
   'gdkx11screen.h',
   'gdkx11selection.h',
   'gdkx11utils.h',
-  'gdkx11visual.h',
   'gdkx11window.h',
 ])