[devhelp] window: remove useless g_object_set_data()

[Frederic Peters <fpeters src gnome org>]

commit 1ef556361f091404afdf3000fde3838c2055091e
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Nov 15 18:27:29 2015 +0100

    window: remove useless g_object_set_data()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=758141

 src/dh-window.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/dh-window.c b/src/dh-window.c
index 34753a5..2a2c117 100644
--- a/src/dh-window.c
+++ b/src/dh-window.c
@@ -1335,7 +1335,6 @@ window_new_tab_label (DhWindow        *window,
         gtk_box_pack_start (GTK_BOX (hbox), close_button, FALSE, FALSE, 0);
 
         g_object_set_data (G_OBJECT (hbox), "label", label);
-        g_object_set_data (G_OBJECT (hbox), "close-button", close_button);
 
         return hbox;
 }