[gtk+/gtk-3-22] Remove an unused field

[Matthias Clasen <matthiasc src gnome org>]

commit e6fd4837a2924b051d233cbe0aafab97f247bd93
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 79054a8..88eea24 100644
--- a/gtk/gtkentry.c
+++ b/gtk/gtkentry.c
@@ -206,7 +206,6 @@ struct _GtkEntryPrivate
 
   gchar        *placeholder_text;
 
-  GtkWidget     *bubble_window;
   GtkTextHandle *text_handle;
   GtkWidget     *selection_bubble;
   guint          selection_bubble_timeout_id;