[gnome-sudoku] Remove extraneous printf

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 432b57d60b2f52ecab2fb62e43bd36048dce9844
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat May 31 17:01:52 2014 -0500

    Remove extraneous printf

 src/gnome-sudoku.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gnome-sudoku.vala b/src/gnome-sudoku.vala
index 22a994e..16ba2a2 100644
--- a/src/gnome-sudoku.vala
+++ b/src/gnome-sudoku.vala
@@ -154,7 +154,7 @@ public class Sudoku : Gtk.Application
         var rater = new SudokuRater(ref completed_board);
         var rating = rater.get_difficulty ();
         rating.pretty_print ();
-        header_bar.set_subtitle ("%s".printf (rating.get_catagory ().to_string ()));
+        header_bar.set_subtitle (rating.get_catagory ().to_string ());
         undo_action.set_enabled (false);
         redo_action.set_enabled (false);