[gnome-boxes] configure: Drop LIBGD_INIT notification option

[Felipe Borges <felipeborges src gnome org>]

commit 6e584e5b78b21684ffc1c9aa3ecfe3e87f4aab64
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon Mar 13 13:24:17 2017 +0100

    configure: Drop LIBGD_INIT notification option
    
    We no longer need to use Gd.Notification since all of our
    notification are now powered by Gtk.Revealer.
    
    See also Bug 777497.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779978

 configure.ac |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 1003480..63525d4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -158,7 +158,6 @@ LIBGD_INIT([
   gtk-hacks
   main-view
   main-icon-view
-  notification
   static
   vapi
 ])