[libadwaita] stylesheet: Remove redundant boxed list rules

[Alexander Mikhaylenko <alexm src gnome org>]

commit 951666b9876d52699e2672e80eaa42806a46cd32
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Tue Sep 21 00:12:05 2021 +0500

    stylesheet: Remove redundant boxed list rules

 src/stylesheet/widgets/_lists.scss | 6 ------
 1 file changed, 6 deletions(-)
---
diff --git a/src/stylesheet/widgets/_lists.scss b/src/stylesheet/widgets/_lists.scss
index 39a8dd0e..8d9e8160 100644
--- a/src/stylesheet/widgets/_lists.scss
+++ b/src/stylesheet/widgets/_lists.scss
@@ -243,12 +243,6 @@ listview.content {
       }
     }
 
-    // Bottom border
-    &.checked-expander-row-previous-sibling,
-    &.expander:checked {
-      border-width: 1px;
-    }
-
     // Rounded bottom
     &:last-child {
       &,