[gtk+] quartz: Drop an unused include

[Matthias Clasen <matthiasc src gnome org>]

commit 77f921f5deb90d0df7c7e3357806ad986e932791
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Nov 17 13:32:03 2017 -0500

    quartz: Drop an unused include
    
    No GdkScreen apis are used in here.

 gdk/quartz/gdkdisplay-quartz.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gdk/quartz/gdkdisplay-quartz.c b/gdk/quartz/gdkdisplay-quartz.c
index 6b044ac..89c8266 100644
--- a/gdk/quartz/gdkdisplay-quartz.c
+++ b/gdk/quartz/gdkdisplay-quartz.c
@@ -26,7 +26,6 @@
 #include "gdkquartzwindow.h"
 #include "gdkquartzdisplay.h"
 #include "gdkquartzdevicemanager-core.h"
-#include "gdkscreen.h"
 #include "gdkmonitorprivate.h"
 #include "gdkdisplay-quartz.h"