[libadwaita] Update POTFILES.skip

[Piotr Drąg <piotrdrag src gnome org>]

commit 1eb3e6cf7229cf1b82eae8d77f823fdac11ec1cc
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat May 15 12:18:28 2021 +0200

    Update POTFILES.skip

 po/POTFILES.skip | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)
---
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index c0da0aad..be4f9a33 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -1,8 +1,3 @@
 # List of source files that should *not* be translated.
 # Please keep this file sorted alphabetically.
-examples/adw-demo-preferences-window.ui
-examples/adw-demo-window.c
-examples/adw-demo-window.ui
-examples/adw-flap-demo-window.c
-examples/adw-flap-demo-window.ui
-examples/adw-view-switcher-demo-window.ui
+examples/