[gtk] Drop the toplevel-vs-popup reftest

[Matthias Clasen <matthiasc src gnome org>]

commit d711ca3a67dd70765c2605eebc73b673787fb5f4
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Feb 10 15:15:05 2020 -0500

    Drop the toplevel-vs-popup reftest
    
    Popups look different from toplevels. I don't think
    a reftest that tries to prove otherwise has much
    leg to stand on.

 testsuite/reftests/meson.build              |  2 --
 testsuite/reftests/toplevel-vs-popup.ref.ui | 11 -----------
 testsuite/reftests/toplevel-vs-popup.ui     | 10 ----------
 3 files changed, 23 deletions(-)
---
diff --git a/testsuite/reftests/meson.build b/testsuite/reftests/meson.build
index 71080d6f32..33ecccbe5a 100644
--- a/testsuite/reftests/meson.build
+++ b/testsuite/reftests/meson.build
@@ -397,8 +397,6 @@ testdata = [
   'textview-margins.ui',
   'textview-tags.ref.ui',
   'textview-tags.ui',
-  'toplevel-vs-popup.ref.ui',
-  'toplevel-vs-popup.ui',
   'treeview-crash-too-wide.ref.ui',
   'treeview-crash-too-wide.ui',
   'treeview-fixed-height.css',