[gnome-tweak-tool] shell.css: Don't override the sidebar bg color

[Jeremy Bicha <jbicha src gnome org>]

commit 5c0c27c1b8e526b9b22f3aee87e9491de3343321
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Sun May 28 11:31:31 2017 -0400

    shell.css: Don't override the sidebar bg color
    
    This more closely resembles the UI of the
    gnome-control-center redesign
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783176

 data/shell.css |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/data/shell.css b/data/shell.css
index 2662298..c04e4de 100644
--- a/data/shell.css
+++ b/data/shell.css
@@ -1,7 +1,4 @@
 /* the sidebar */
-.tweak-categories {
-    background-color: shade(@theme_bg_color, 0.99)
-}
 .tweak-category {
     padding: 10px;
 }