Removed redundant System 16 layers unused by OutRun

src/main/video.cpp

@@ -145,15 +145,9 @@ void Video::draw_frame()
         tile_layer->update_tile_values();
 
         (hwroad.*hwroad.render_background)(pixels);
-        sprite_layer->render(1);
         tile_layer->render_tile_layer(pixels, 1, 0);      // background layer
-        sprite_layer->render(2);
-        tile_layer->render_tile_layer(pixels, 1, 1);      // background layer
         tile_layer->render_tile_layer(pixels, 0, 0);      // foreground layer
-        sprite_layer->render(4);
-        tile_layer->render_tile_layer(pixels, 0, 1);      // foreground layer
         (hwroad.*hwroad.render_foreground)(pixels);
-        tile_layer->render_text_layer(pixels, 0);
         sprite_layer->render(8);
         tile_layer->render_text_layer(pixels, 1);
      }