[gnome-usage] window: Drop get_header_bar()

[Adrien Plazas <aplazas src gnome org>]

commit ad08caf267313ccdbc3dc90571b561237e06a490
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Wed Jun 24 16:32:20 2020 +0200

    window: Drop get_header_bar()
    
    This avoids exposing the header bar, making the window more cohesive.

 src/window.vala | 5 -----
 1 file changed, 5 deletions(-)
---
diff --git a/src/window.vala b/src/window.vala
index 327eab2..cf2f05c 100644
--- a/src/window.vala
+++ b/src/window.vala
@@ -95,11 +95,6 @@ namespace Usage
             header_bar.action_on_search();
         }
 
-        public Usage.HeaderBar get_header_bar()
-        {
-            return header_bar;
-        }
-
         public View[] get_views()
         {
             return views;