Editor: fix site editor layout bug.

Removes additional wrapper introduced in [56025], which interfered with the site editor flex layout.

Props ramonopoly, kevin940726, joedolson.
Fixes 56228.


git-svn-id: https://develop.svn.wordpress.org/trunk@56029 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/site-editor.php

@@ -132,9 +132,7 @@ do_action( 'enqueue_block_editor_assets' );
 require_once ABSPATH . 'wp-admin/admin-header.php';
 ?>
 
-<div class="edit-site">
-	<div id="site-editor"></div>
-
+<div class="edit-site" id="site-editor">
 	<?php // JavaScript is disabled. ?>
 	<div class="wrap hide-if-js site-editor-no-js">
 		<h1 class="wp-heading-inline"><?php _e( 'Edit site' ); ?></h1>