Removed SpriteBatch:remove(id) (reverted commit 2ca82dd)

The implementation had issues with sprite draw order when SpriteBatch:add used indices in the vertex buffer previously freed with SpriteBatch:remove

src/modules/graphics/opengl/SpriteBatch.h

@@ -23,7 +23,6 @@
 
 // C
 #include <cstring>
-#include <deque>
 
 // LOVE
 #include "common/math.h"
@@ -64,7 +63,6 @@ public:
 
 	int add(float x, float y, float a, float sx, float sy, float ox, float oy, float kx, float ky, int index = -1);
 	int addq(Quad *quad, float x, float y, float a, float sx, float sy, float ox, float oy, float kx, float ky, int index = -1);
-	void remove(int index);
 	void clear();
 
 	void *lock();
@@ -127,10 +125,6 @@ private:
 	VertexBuffer *array_buf;
 	VertexIndex *element_buf;
 
-	// List of gaps in the SpriteBatch. Checked when adding sprites, and added
-	// to when removing them.
-	std::deque<int> gaps;
-
 }; // SpriteBatch
 
 } // opengl