[gtk/wip/exalm/polish: 5/8] adwaita: Remove a redundant -gtk-icon-shadow: none

[Alexander Mikhaylenko <alexm src gnome org>]

commit 24e3556c3020b023f3919eba767d136a8f91ca45
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Thu May 7 01:01:12 2020 +0500

    adwaita: Remove a redundant -gtk-icon-shadow: none
    
    Buttons have no icon shadows anymore anyway.

 gtk/theme/Adwaita/_common.scss | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 19563f1933..829cd31390 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -1364,8 +1364,6 @@ windowcontrols {
     margin: 0 2px;
     min-width: 0;
     min-height: 0;
-
-    &:backdrop { -gtk-icon-shadow: none; }
   }
 }