[gtk] Remove nonexisting function from header

[Benjamin Otte <otte src gnome org>]

commit dead174d70f67d8cfb4a39b6d79a4b119fd93b89
Author: Benjamin Otte <otte redhat com>
Date:   Tue Feb 19 18:02:46 2019 +0100

    Remove nonexisting function from header

 gtk/gtkprivate.h | 6 ------
 1 file changed, 6 deletions(-)
---
diff --git a/gtk/gtkprivate.h b/gtk/gtkprivate.h
index 3662d68838..4f35ebec66 100644
--- a/gtk/gtkprivate.h
+++ b/gtk/gtkprivate.h
@@ -101,12 +101,6 @@ gboolean         gtk_widget_translate_coordinatesf (GtkWidget  *src_widget,
                                                     double     *dest_x,
                                                     double     *dest_y);
 
-GtkWidget *     _gtk_toplevel_pick (GtkWindow *toplevel,
-                                    gdouble    x,
-                                    gdouble    y,
-                                    gdouble   *x_out,
-                                    gdouble   *y_out);
-
 gdouble _gtk_get_slowdown (void);
 void    _gtk_set_slowdown (gdouble slowdown_factor);