[gtk+] Remove an unused field

[Matthias Clasen <matthiasc src gnome org>]

commit 342fdee0a1b28e0b0b1faf638ceb796fd53fd133
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Aug 11 19:52:29 2017 -0400

    Remove an unused field
    
    Nothing uses bubble_window, so it can go.

 gtk/gtkentry.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkentry.c b/gtk/gtkentry.c
index b33f4fd..7240ec9 100644
--- a/gtk/gtkentry.c
+++ b/gtk/gtkentry.c
@@ -191,7 +191,6 @@ struct _GtkEntryPrivate
 
   gchar        *placeholder_text;
 
-  GtkWidget     *bubble_window;
   GtkTextHandle *text_handle;
   GtkWidget     *selection_bubble;
   guint          selection_bubble_timeout_id;