[gtk/kill-tree-menu: 30/52] gtk-demo: Remove the change display demo

[Matthias Clasen <matthiasc src gnome org>]

commit 66390cc3c2ead6c9f00d833ee7ca3a8ee5ff8091
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Dec 28 11:02:49 2019 -0500

    gtk-demo: Remove the change display demo
    
    The window picking code has been broken for a while.
    Since this is not really functionality that we should
    highlight to application developers, remove the demo
    instead of patching it up.

 demos/gtk-demo/changedisplay.c    | 551 --------------------------------------
 demos/gtk-demo/demo.gresource.xml |   1 -
 demos/gtk-demo/meson.build        |   1 -
 3 files changed, 553 deletions(-)
---
diff --git a/demos/gtk-demo/demo.gresource.xml b/demos/gtk-demo/demo.gresource.xml
index 6827b57cb3..3a58d42011 100644
--- a/demos/gtk-demo/demo.gresource.xml
+++ b/demos/gtk-demo/demo.gresource.xml
@@ -149,7 +149,6 @@
     <file>application_demo.c</file>
     <file>assistant.c</file>
     <file>builder.c</file>
-    <file>changedisplay.c</file>
     <file>clipboard.c</file>
     <file>colorsel.c</file>
     <file>combobox.c</file>
diff --git a/demos/gtk-demo/meson.build b/demos/gtk-demo/meson.build
index 1a1721b02a..4f5209d6d9 100644
--- a/demos/gtk-demo/meson.build
+++ b/demos/gtk-demo/meson.build
@@ -4,7 +4,6 @@ demos = files([
   'application_demo.c',
   'assistant.c',
   'builder.c',
-  'changedisplay.c',
   'clipboard.c',
   'colorsel.c',
   'combobox.c',