[gtk+] Remove an unused function

[Matthias Clasen <matthiasc src gnome org>]

commit 0ba67021a901467345f18ac8f8f1ad2adcf9ff0f
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Oct 25 15:31:55 2016 -0400

    Remove an unused function
    
    This function is no longer used, now that offscreen windows are gone.

 gdk/gdkwindow.c |   13 -------------
 1 files changed, 0 insertions(+), 13 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index febc3c0..548f4f0 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -1058,19 +1058,6 @@ get_native_device_event_mask (GdkWindow *private,
 }
 
 static GdkEventMask
-get_native_grab_event_mask (GdkEventMask grab_mask)
-{
-  /* Similar to the above but for pointer events only */
-  return
-    GDK_POINTER_MOTION_MASK |
-    GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
-    GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
-    GDK_SCROLL_MASK |
-    (grab_mask &
-     ~GDK_POINTER_MOTION_HINT_MASK);
-}
-
-static GdkEventMask
 get_native_event_mask (GdkWindow *private)
 {
   return get_native_device_event_mask (private, NULL);