Editor: Remove missing postType and postId query args Site Editor red…

…irect.

Removes the server-side redirection if missing `postType` and `postId` query args when visiting Site Editor. Why? This redirect is no longer needed as the routing is now handled client side (via [55333]).

References:
* [WordPress/gutenberg#48023 Gutenberg PR 48023]
* [WordPress/gutenberg#47777 Gutenberg PR 47777]

Follow-up to [55333], [53413], [53093].

Props ntsekouras, youknowriad.
Fixes #57716.

git-svn-id: https://develop.svn.wordpress.org/trunk@55338 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/site-editor.php

@@ -28,23 +28,6 @@
 	wp_die( __( 'The theme you are currently using is not compatible with the Site Editor.' ) );
 }
 
-/**
- * Do a server-side redirection if missing `postType` and `postId`
- * query args when visiting Site Editor.
- */
-$home_template = _resolve_home_block_template();
-if ( $home_template && empty( $_GET['postType'] ) && empty( $_GET['postId'] ) ) {
-	if ( ! empty( $_GET['styles'] ) ) {
-		$home_template['styles'] = sanitize_key( $_GET['styles'] );
-	}
-	$redirect_url = add_query_arg(
-		$home_template,
-		admin_url( 'site-editor.php' )
-	);
-	wp_safe_redirect( $redirect_url );
-	exit;
-}
-
 // Used in the HTML title tag.
 $title       = _x( 'Editor', 'site editor title tag' );
 $parent_file = 'themes.php';