Remove ad-hoc stack level fix

This is no longer necessary as we now raise windows when we know if they will be
visible after animation, which is much better than after animation is finished.

tiling.js

@@ -490,9 +490,6 @@ function ensure_viewport(space, meta_window, force) {
                   // Certain gnome-shell/mutter animations expect default
                   // pivot point (eg. fullscreen)
                   meta_window.get_compositor_private().set_pivot_point(0, 0);
-
-                  // Make sure that the top of the stack level is properly done
-                  fixStackLevels(space);
               },
               onStart:() => { meta_window.raise(); }
             });
@@ -500,24 +497,6 @@ function ensure_viewport(space, meta_window, force) {
     return x;
 }
 
-function fixStackLevels(space) {
-    // Make sure that the top of the stack level is properly done
-    let from = space.indexOf(space.topOfLeftStack());
-    let to = space.indexOf(space.topOfRightStack());
-    from = Math.max(0, from);
-
-    if (to === -1) {
-        // No right stack, so we need to loop to the end
-        to = spaces.length;
-    } else {
-        space[to].raise();
-    }
-    // Raise all windows up to the last non-stacked window
-    for (let i = from; i < to; i++) {
-        space[i].raise();
-    }
-}
-
 function focus_handler(meta_window, user_data) {
     debug("focus:", meta_window.title, utils.framestr(meta_window.get_frame_rect()));