[gtk] Revert "Adwaita: avoid clipping menu shadows"

[Jakub Steiner <jimmac src gnome org>]

commit 30f789650f19b15396bf29fc053c2f225b7339da
Author: Jakub Steiner <jimmac gmail com>
Date:   Mon Dec 7 10:58:12 2020 +0100

    Revert "Adwaita: avoid clipping menu shadows"
    
    While the workaround hides majority of the issue there are still two big downsides:
    
      - shadow does eat from the widget dimensions so alignment is broken
      - situations like popover going upwards on screen edge break completely
    
    The appropriate action is to revert these theme duct tape solutions to make room
    for a proper fix.
    
    This reverts commit b3dba1dca66d380d1cfafbe92b36d7854b3f4244.
    
    Issue https://gitlab.gnome.org/GNOME/gtk/-/issues/1987

 gtk/theme/Adwaita/_common.scss | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 5ad1236b49..5d60753d91 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -1861,7 +1861,6 @@ $_menu-padding: 12px; //inner menuitem padding
 
 popover.menu {
   padding: 0;
-  margin: 0 3px 5px 3px; //alocate space for dropshadow. #1987
 
   box.inline-buttons {
     padding: 0 $_menu-padding;