[gnome-boxes] topbar: Remove now redundant work around

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 5ec31f7db1eae94c7a59ad553d735c408cd46f6e
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Sat Oct 18 15:46:47 2014 +0100

    topbar: Remove now redundant work around

 src/topbar.vala |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/src/topbar.vala b/src/topbar.vala
index 15808da..52cbc10 100644
--- a/src/topbar.vala
+++ b/src/topbar.vala
@@ -101,8 +101,7 @@ private class Boxes.Topbar: Gtk.Stack, Boxes.UI {
         this.window = window;
 
         window.notify["selection-mode"].connect (() => {
-            // FIXME: Usage of 'this' is a work around for https://bugzilla.gnome.org/show_bug.cgi?id=734877
-            page = this.window.selection_mode ?
+            page = window.selection_mode ?
                 TopbarPage.SELECTION : page = TopbarPage.COLLECTION;
         });