[gtk/wip/exalm/headerbar-css: 2/2] adwaita: Remove the nested headerbars hack

[Alexander Mikhaylenko <alexm src gnome org>]

commit aa693159dca2eeb477ec7d08fd5e8351cae98c64
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Wed Mar 3 17:35:15 2021 +0500

    adwaita: Remove the nested headerbars hack
    
    We clip the window now, it's not necessary anymore.

 gtk/theme/Adwaita/_common.scss | 10 ----------
 1 file changed, 10 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 3bd5af4506..4c1b378a2d 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -1544,16 +1544,6 @@ headerbar {
     margin-top: 10px;
     margin-bottom: 10px;
   }
-
-  &.titlebar headerbar:not(.titlebar) {
-    // Drop the background of non-titlebar nested headerbars. This is needed to
-    // work around headerbar sliding animation issues without refactoring
-    // Adwaita's support of titlebars and headerbars as it may break
-    // applications.
-    // See https://gitlab.gnome.org/GNOME/gtk/issues/1264 for more information.
-    background: none;
-    box-shadow: none;
-  }
 }