diff --git a/game.h b/game.h
index f34c5ab..892c843 100644
--- a/game.h
+++ b/game.h
@@ -18,14 +18,4 @@ extern int height;	/* game canvas height */
 
 extern GtkWidget * canvas;	/* game canvas object */
 
-#if 0
-extern void game_init (); 	/* implemented by the application */
-
-/* game frame function to be provided by the game application */
-extern gboolean game_draw_frame (GtkWidget * widget, cairo_t * cr, gpointer data);
-
-extern void set_game_resize_callback (gboolean (*game_resize) ());
-extern void set_game_keyboard_input_callback (gint (*keyboard_input)(GtkWidget *, GdkEventKey *));
-extern void set_game_mouse_scroll_callback (gboolean (*mouse_scroll)(GtkWidget *, GdkEvent *, gpointer));
-#endif
 #endif