[gtkmm] Container: Remove propagate_draw().

[Murray Cumming <murrayc src gnome org>]

commit 6b405a52e62b38c92634bf2308d6c9ce219a4c4c
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Aug 25 14:36:11 2017 +0200

    Container: Remove propagate_draw().
    
    Because it was removed from GTK+:
    https://git.gnome.org/browse/gtk+/commit/?id=b24535ea7542c505e100faad25f9fa53da773440

 gtk/src/container.hg |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gtk/src/container.hg b/gtk/src/container.hg
index 974ec8e..5f36f22 100644
--- a/gtk/src/container.hg
+++ b/gtk/src/container.hg
@@ -111,8 +111,6 @@ public:
 #m4 _CONVERSION(`GList*',`std::vector<const Widget*>',`Glib::ListHandler<const Widget*>::list_to_vector($3, 
Glib::OWNERSHIP_SHALLOW)')
   _WRAP_METHOD(std::vector<const Widget*> get_children() const, gtk_container_get_children)
 
-  _WRAP_METHOD(void propagate_draw(Widget& child, const ::Cairo::RefPtr< ::Cairo::Context>& cr), 
gtk_container_propagate_draw)
-
 #m4 _CONVERSION(`const std::vector<Widget*>&',`GList*',`Glib::ListHandler<Widget*>::vector_to_list($3).data 
()')
   _WRAP_METHOD(void set_focus_chain(const std::vector<Widget*>& focusable_widgets),
                gtk_container_set_focus_chain)