Gui: Direct Draw API (#2215)

* Furi: allow on-fly thread priority change. Gui: Direct Draw API. DirectDraw debug app.
* Gui: drop input in direct draw
* Furi: handle priority change for starting threads
* DirectDraw: rollback to FreeRTOS primitives for priority change

applications/services/gui/canvas_i.h

@@ -31,18 +31,6 @@ Canvas* canvas_init();
  */
 void canvas_free(Canvas* canvas);
 
-/** Reset canvas drawing tools configuration
- *
- * @param      canvas  Canvas instance
- */
-void canvas_reset(Canvas* canvas);
-
-/** Commit canvas. Send buffer to display
- *
- * @param      canvas  Canvas instance
- */
-void canvas_commit(Canvas* canvas);
-
 /** Get canvas buffer.
  *
  * @param      canvas  Canvas instance