remove unused gl_buffer pointer on GLBufferToAttribMapping structure

src/main.cpp

@@ -329,8 +329,8 @@ loadScene(RenderState* rs)
 	if (!pos_attrib || !normal_attrib) return false;
 
 	GLBufferToAttribMapping attrib_mappings[2] = {
-		{ "position", nullptr, pos_attrib, texmesh.vertices },
+		{ "position", pos_attrib, texmesh.vertices },
-		{ "normal", nullptr, normal_attrib, texmesh.normals }
+		{ "normal", normal_attrib, texmesh.normals }
 	};
 
 	const u32 NUM_CUBES = 4;

src/shader.h

@@ -92,7 +92,6 @@ struct GLContext
 struct GLBufferToAttribMapping
 {
 	const char* buf_name;
-	gl_buffer* attrib_buf;
 	GLVertexAttrib* attrib;
 	void* mesh_buf;
 };