[gnome-sudoku/vala-port] Remove several unused functions

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 8056ad4f5b7e2e2ead152a91e64b1514a6be66bb
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Apr 1 19:13:12 2014 -0500

    Remove several unused functions

 src/gnome-sudoku.vala |   30 ------------------------------
 1 files changed, 0 insertions(+), 30 deletions(-)
---
diff --git a/src/gnome-sudoku.vala b/src/gnome-sudoku.vala
index 71a7c9d..bc18455 100644
--- a/src/gnome-sudoku.vala
+++ b/src/gnome-sudoku.vala
@@ -475,36 +475,6 @@ public class Sudoku : Gtk.Application
         window.destroy ();
     }
 
-    public void toggle_hints_cb (Widget widget)
-    {
-        view.show_hints = !view.show_hints;
-    }
-
-    public void toggle_warnings_cb (Widget widget)
-    {
-        view.show_warnings = !view.show_warnings;
-    }
-
-    public void hint_cb (Widget widget)
-    {
-        view.hint ();
-    }
-
-    public void clear_top_notes_cb (Widget widget)
-    {
-        view.clear_top_notes ();
-    }
-
-    public void clear_bottom_notes_cb (Widget widget)
-    {
-        view.clear_bottom_notes ();
-    }
-
-    public void toggle_tracker_cb (Widget widget)
-    {
-        stdout.printf ("TODO: Toggle tracker\n");
-    }
-
     public void help_cb ()
     {
         try