[gtk+] button: Remove unused flag

[Matthias Clasen <matthiasc src gnome org>]

commit 8d2d2ae07fcaca8c2f01113ade47bf36e257179a
Author: Timm Bäder <mail baedert org>
Date:   Sun May 7 10:59:47 2017 +0200

    button: Remove unused flag

 gtk/gtkbuttonprivate.h |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkbuttonprivate.h b/gtk/gtkbuttonprivate.h
index 909a5f1..ebb8ec6 100644
--- a/gtk/gtkbuttonprivate.h
+++ b/gtk/gtkbuttonprivate.h
@@ -36,7 +36,6 @@ struct _GtkButtonPrivate
   guint                  activate_timeout;
 
   guint          button_down           : 1;
-  guint          constructed           : 1;
   guint          in_button             : 1;
   guint          use_underline         : 1;
   guint          child_type            : 2;