[gnome-todo] window: remove unused callback

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 97afc21adc22631b0aa404ce83d15e7c4df0f0d0
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Aug 27 09:23:31 2015 -0300

    window: remove unused callback

 data/ui/window.ui |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/window.ui b/data/ui/window.ui
index 2283a47..09ddfb1 100644
--- a/data/ui/window.ui
+++ b/data/ui/window.ui
@@ -16,7 +16,6 @@
     <property name="default_width">800</property>
     <property name="default_height">600</property>
     <signal name="key-press-event" handler="gtd_window__on_key_press_event" object="search_bar" swapped="no" 
/>
-    <signal name="window-state-event" handler="gtd_window__window_state_changed" object="GtdWindow" 
swapped="no"/>
     <child>
       <object class="GtkOverlay" id="overlay">
         <property name="visible">True</property>