script: Skip clearing subtree layout boxes of detached element when attaching shadow to it (#44052)

There is no layout boxes to clear in this case. For the example in
#43998,
this skips the traversal many times.

Testing: Should not change visible behaviour.
[Try](https://github.com/servo/servo/actions/runs/24131782865).

---------

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

components/script/dom/node/node.rs

@@ -365,7 +365,7 @@ impl Node {
     }
 
     /// Clear this [`Node`]'s layout data and also clear the layout data of all children.
-    /// Note that clears layout data from all non-flat tree descendants and flat tree
+    /// Note that this clears layout data from all non-flat tree descendants and flat tree
     /// descendants.
     pub(crate) fn remove_layout_boxes_from_subtree(&self) {
         for node in self.traverse_preorder(ShadowIncluding::Yes) {