[gnome-shell-sass] _common: Don't specify background-position: center;

[Jasper St. Pierre <jstpierre src gnome org>]

commit 04c721a71fe879d77cb5a03c5e291ac57fe3ca0c
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Fri Feb 20 17:42:14 2015 -0800

    _common: Don't specify background-position: center;
    
    It's not needed and gnome-shell doesn't support it.

 _common.scss |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/_common.scss b/_common.scss
index 5fe99d7..d8f6704 100644
--- a/_common.scss
+++ b/_common.scss
@@ -766,7 +766,6 @@ StScrollBar {
       color: white;
       background-color: transparent;
       width: 32px;
-      background-position: center;
       border-radius: 4px;
       &:hover, &:focus { background-color: transparentize($fg_color,0.95); }
       &:active { background-color: transparentize($bg_color,0.95); }