[gtk] adwaita: Remove a dead rule

[Timm Bäder <baedert src gnome org>]

commit 37906a2200868197f571fd6b459c473d40c928c6
Author: Timm Bäder <mail baedert org>
Date:   Sat Jul 13 18:08:45 2019 +0200

    adwaita: Remove a dead rule
    
    GtkFileChooserButtons are called "filechooserbutton" these days, not
    button.file

 gtk/theme/Adwaita/_common.scss | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index ae777dd661..7a5b05d802 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -856,10 +856,10 @@ button {
   }
 
   // hide separators
-  &.font,
-  &.file { separator { background-color: transparent; }}
-
-  &.font { > box > box > label { font-weight: bold; }}
+  &.font{
+    separator { background-color: transparent; }
+    > box > box > label { font-weight: bold; }
+  }
 
   // inline-toolbar buttons
   .inline-toolbar & { @extend %linked; }