[goocanvas] gtk4: Adapt to changed GtkContainer::forall signature.

[Murray Cumming <murrayc src gnome org>]

commit f109c887aa9b4e59b98d4596ec490a7ae68a2007
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon May 29 18:27:49 2017 +0200

    gtk4: Adapt to changed GtkContainer::forall signature.

 src/goocanvas.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/goocanvas.c b/src/goocanvas.c
index d2ca2b1..f7a5b46 100644
--- a/src/goocanvas.c
+++ b/src/goocanvas.c
@@ -220,7 +220,6 @@ static void     goo_canvas_set_property    (GObject          *object,
 static void     goo_canvas_remove          (GtkContainer     *container,
                                            GtkWidget        *widget);
 static void     goo_canvas_forall          (GtkContainer     *container,
-                                           gboolean          include_internals,
                                            GtkCallback       callback,
                                            gpointer          callback_data);
 static gboolean goo_canvas_query_tooltip   (GtkWidget       *widget,
@@ -4462,7 +4461,6 @@ goo_canvas_unregister_widget_item (GooCanvas          *canvas,
 
 static void
 goo_canvas_forall (GtkContainer *container,
-                  gboolean      include_internals,
                   GtkCallback   callback,
                   gpointer      callback_data)
 {