[gtk+] Revert "Adwaita: checkbutton and radiobutton backdrop color fix"

[Lapo Calamandrei <lapo src gnome org>]

commit ec500422285810149fca934c300dc25dd279ef6f
Author: Lapo Calamandrei <calamandrei gmail com>
Date:   Sat Mar 19 18:57:33 2016 +0100

    Revert "Adwaita: checkbutton and radiobutton backdrop color fix"
    
    This reverts commit 43937c6aa0bc0966f4bb0518c443a3f212c9d300.
    Which was needed since the label styling was broken.

 gtk/theme/Adwaita/_common.scss           |    2 --
 gtk/theme/Adwaita/gtk-contained-dark.css |    2 --
 gtk/theme/Adwaita/gtk-contained.css      |    2 --
 3 files changed, 0 insertions(+), 6 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 0052a58..e2d4d37 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -2505,8 +2505,6 @@ checkbutton.text-button, radiobutton.text-button {
     &:last-child { margin-right: 4px; }
   }
 
-  &:backdrop { color: $backdrop_fg_color; }
-
   &:disabled {
     &:active, &:indeterminate, & {
       // set insensitive color, which is overriden otherwise
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index dfc3097..0e8259a 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -2522,8 +2522,6 @@ checkbutton.text-button, radiobutton.text-button {
     margin-left: 4px; }
   checkbutton.text-button label:not(:only-child):last-child, radiobutton.text-button 
label:not(:only-child):last-child {
     margin-right: 4px; }
-  checkbutton.text-button:backdrop, radiobutton.text-button:backdrop {
-    color: #949796; }
   checkbutton.text-button:disabled:active, checkbutton.text-button:disabled:indeterminate, 
checkbutton.text-button:disabled, radiobutton.text-button:disabled:active, 
radiobutton.text-button:disabled:indeterminate, radiobutton.text-button:disabled {
     color: #949796; }
     checkbutton.text-button:disabled:active:backdrop, 
checkbutton.text-button:disabled:indeterminate:backdrop, checkbutton.text-button:disabled:backdrop, 
radiobutton.text-button:disabled:active:backdrop, radiobutton.text-button:disabled:indeterminate:backdrop, 
radiobutton.text-button:disabled:backdrop {
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 0acfa23..2d9a81b 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -2546,8 +2546,6 @@ checkbutton.text-button, radiobutton.text-button {
     margin-left: 4px; }
   checkbutton.text-button label:not(:only-child):last-child, radiobutton.text-button 
label:not(:only-child):last-child {
     margin-right: 4px; }
-  checkbutton.text-button:backdrop, radiobutton.text-button:backdrop {
-    color: #8b8e8f; }
   checkbutton.text-button:disabled:active, checkbutton.text-button:disabled:indeterminate, 
checkbutton.text-button:disabled, radiobutton.text-button:disabled:active, 
radiobutton.text-button:disabled:indeterminate, radiobutton.text-button:disabled {
     color: #8b8e8f; }
     checkbutton.text-button:disabled:active:backdrop, 
checkbutton.text-button:disabled:indeterminate:backdrop, checkbutton.text-button:disabled:backdrop, 
radiobutton.text-button:disabled:active:backdrop, radiobutton.text-button:disabled:indeterminate:backdrop, 
radiobutton.text-button:disabled:backdrop {