[gnome-games/wip/exalm/css] ui: Remove separator and titlebar libhandy styles

[Alexander Mikhaylenko <alexm src gnome org>]

commit d54484461b65fae8e6972e4abc8fdf0996bf583e
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Sat Sep 22 19:26:07 2018 +0500

    ui: Remove separator and titlebar libhandy styles
    
    They were merged into GTK 3.24.1 and can be removed now.

 data/gtk-style.css | 27 ---------------------------
 1 file changed, 27 deletions(-)
---
diff --git a/data/gtk-style.css b/data/gtk-style.css
index 2474ae3c..bddbeb35 100644
--- a/data/gtk-style.css
+++ b/data/gtk-style.css
@@ -35,30 +35,3 @@ stacksidebar list {
        border-right-width: 0px;
 }
 
-/* Needed for separators to look good. These have been submitted upstream here:
- * https://gitlab.gnome.org/GNOME/gtk/merge_requests/323
- */
-
-separator.sidebar {
-       background-color: @borders;
-       border-style: none;
-       margin: 0px 0px 0px 0px;
-}
-
-separator.sidebar:backdrop {
-       background-color: @unfocused_borders;
-}
-
-separator.sidebar.selection-mode,
-.selection-mode separator.sidebar {
-       background-color: mix(@theme_selected_bg_color, #000, 0.2);
-}
-
-/* Needed for HdyTitleBar to work. This has been merged upstream but no release
- * include it yet, it is likely to be released as part of GTK+ 3.24.1.
- */
-headerbar.titlebar headerbar:not(.titlebar) {
-       background-color: rgba (0, 0, 0, 0);
-       background-image: none;
-       box-shadow: none;
-}