[gnome-shell] theme: Don't apply inconsistent hover style to menu items in submenus

[Jakub Steiner <jimmac src gnome org>]

commit b0ca52ffdc37cb8fb685e425638636a1eae33679
Author: nana-4 <hnmaigo gmail com>
Date:   Mon Jan 13 00:06:18 2020 +0900

    theme: Don't apply inconsistent hover style to menu items in submenus
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/2088

 data/theme/gnome-shell-sass/widgets/_popovers.scss | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/data/theme/gnome-shell-sass/widgets/_popovers.scss 
b/data/theme/gnome-shell-sass/widgets/_popovers.scss
index 6b708016e8..f0c87e19ad 100644
--- a/data/theme/gnome-shell-sass/widgets/_popovers.scss
+++ b/data/theme/gnome-shell-sass/widgets/_popovers.scss
@@ -73,8 +73,6 @@ $popover_arrow_height: 12px;
   box-shadow: none;
   border-top: 1px solid transparentize($borders_color, 0.2);
   border-bottom: 1px solid transparentize($borders_color, 0.2);
-
-  .popup-menu-item:hover {background-color: darken($bg_color, 7%);}
 }
 
 // container for radio and check boxes