[gtkmm] Gtk::Dialog: Remove get_action_area()

[Kjell Ahlstedt <kjellahl src gnome org>]

commit b0a4201c76c09cd6ac3d0a1fa47c238829292f84
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Sun Nov 20 16:14:08 2016 +0100

    Gtk::Dialog: Remove get_action_area()
    
    because gtk_dialog_get_action_area() has been removed.

 gtk/src/dialog.hg |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/gtk/src/dialog.hg b/gtk/src/dialog.hg
index d73668d..a82ff8b 100644
--- a/gtk/src/dialog.hg
+++ b/gtk/src/dialog.hg
@@ -138,11 +138,6 @@ public:
    */
   _WRAP_METHOD(int run(), gtk_dialog_run)
 
-  // This previously returned an HButtonBox*, which broke on Maemo Fremantle.
-  // Changed post-2.18.2
-  _WRAP_METHOD(ButtonBox* get_action_area(), gtk_dialog_get_action_area, deprecated "Direct access to the 
action area is discouraged. Use add_button(), etc.")
-  _WRAP_METHOD(const ButtonBox* get_action_area() const, gtk_dialog_get_action_area, constversion, 
deprecated "Direct access to the action area is discouraged. Use add_button(), etc.")
-
   _WRAP_METHOD(Box* get_content_area(), gtk_dialog_get_content_area)
   _WRAP_METHOD(const Box* get_content_area() const, gtk_dialog_get_content_area, constversion)