[gnome-boxes] wizard: Remove a redundant call causing warnings

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit a12b31234b5542bd0b9529ded9bd83a15a7aed3e
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Mon Jul 29 16:33:55 2013 +0300

    wizard: Remove a redundant call causing warnings
    
    Leftover from an under-development version of commit a3302e1.

 src/wizard.vala |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/wizard.vala b/src/wizard.vala
index 939b990..903ddbb 100644
--- a/src/wizard.vala
+++ b/src/wizard.vala
@@ -628,7 +628,6 @@ private class Boxes.Wizard: Boxes.UI {
         nokvm_infobar.halign = Gtk.Align.FILL;
         nokvm_infobar.spacing = 10;
         var container = nokvm_infobar.get_content_area () as Gtk.Container;
-        container.add (hbox);
         var image = new Gtk.Image.from_stock (Gtk.Stock.DIALOG_WARNING, Gtk.IconSize.LARGE_TOOLBAR);
         container.add (image);
         label = new Gtk.Label (_("Virtualization extensions are unavailable on your system. If your system 
is recent (post 2008), check your BIOS settings to enable them."));