Display: removed drawing_queue_ member

This was the core of the surface-based drawing engine. Unused now. The drawing_queue_add()
calls throughout the code have been left, but commented out, for reference while reimplementing
things. The actual drawing_queue code has been left to, since its layers are referenced in
places. Need to remove them.

src/display.cpp

@@ -188,7 +188,6 @@ display::display(const display_context * dc, std::weak_ptr<wb::manager> wb, repo
 	, animate_water_(true)
 	, flags_()
 	, activeTeam_(0)
-	, drawing_queue_()
 	, map_screenshot_(false)
 	, reach_map_()
 	, overlays_(nullptr)

src/display.hpp

@@ -1059,41 +1059,6 @@ class display : public video2::draw_layering
 	// TODO sort
 	std::size_t activeTeam_;
 
-	drawing_queue drawing_queue_;
-
-public:
-	drawing_queue& get_drawing_queue()
-	{
-		return drawing_queue_;
-	}
-
-	/**
-	 * Add an item to the drawing buffer. You need to update screen on affected area
-	 *
-	 */
-
-	void drawing_queue_add(const drawing_queue::layer,
-			const map_location&,
-			int,
-			int,
-			const surface&,
-			const SDL_Rect& clip = SDL_Rect())
-	{
-		UNUSED(clip);
-	}
-
-	void drawing_queue_add(const drawing_queue::layer,
-			const map_location&,
-			int,
-			int,
-			const std::vector<surface>&,
-			const SDL_Rect& clip = SDL_Rect())
-	{
-		UNUSED(clip);
-	}
-
-protected:
-
 	/** Used to indicate to drawing functions that we are doing a map screenshot */
 	bool map_screenshot_;
 

src/whiteboard/attack.cpp

@@ -183,8 +183,8 @@ void attack::draw_hex(const map_location& hex)
 			int xpos = display::get_singleton()->get_location_x(get_dest_hex());
 			int ypos = display::get_singleton()->get_location_y(get_dest_hex());
 
-			display::get_singleton()->drawing_queue_add(layer, get_dest_hex(), xpos, ypos,
-					image::get_image("whiteboard/attack-indicator-src-" + direction_text + ".png"));
+			//display::get_singleton()->drawing_queue_add(layer, get_dest_hex(), xpos, ypos,
+			//		image::get_image("whiteboard/attack-indicator-src-" + direction_text + ".png"));
 		}
 		else if (hex == target_hex_) //add symbol to defender hex
 		{