restore cube test

hw3d/App.cpp

@@ -23,11 +23,6 @@ void App::DoFrame()
 {
 	const float c = sin( timer.Peek() ) / 2.0f + 0.5f;
 	wnd.Gfx().ClearBuffer( c,c,1.0f );
-	wnd.Gfx().DrawTestTriangle(
-		-timer.Peek(),
-		0.0f,
-		0.0f
-	);
 	wnd.Gfx().DrawTestTriangle(
 		timer.Peek(),
 		wnd.mouse.GetPosX() / 400.0f - 1.0f,