fix: revert changes related to layout metrics

This PR partially reverts #7390
until crbug.com/1297087 is resolved. The pageX/pageY values returned
by Page.getLayoutMetrics don't look correct.

Fixes: #7999

src/common/JSHandle.ts

@@ -957,9 +957,7 @@ export class ElementHandle<
     assert(boundingBox.height !== 0, 'Node has 0 height.');
 
     const layoutMetrics = await this._client.send('Page.getLayoutMetrics');
-    // Fallback to `layoutViewport` in case of using Firefox.
-    const { pageX, pageY } =
-      layoutMetrics.cssLayoutViewport || layoutMetrics.layoutViewport;
+    const { pageX, pageY } = layoutMetrics.layoutViewport;
 
     const clip = Object.assign({}, boundingBox);
     clip.x += pageX;