Fix T60379: Cycles viewport adaptive subdivision hangs after updates.

The camera world to raster computation was using wrong values. Also fixes
update when changing subdivision scene settings.

intern/cycles/blender/blender_mesh.cpp

@@ -927,8 +927,6 @@ static void create_subd_mesh(Scene *scene,
 	sdparams.dicing_rate = max(0.1f, RNA_float_get(&cobj, "dicing_rate") * dicing_rate);
 	sdparams.max_level = max_subdivisions;
 
-	scene->dicing_camera->update(scene);
-	sdparams.camera = scene->dicing_camera;
 	sdparams.objecttoworld = get_transform(b_ob.matrix_world());
 }