Bootstrap: after r38409 and r38410, revert r38402 which reverted r38399.

This fixes the paths in `wp-vendor/` that were including `src`. I want to drop this in so we can find out what else will break.

See #36335.


git-svn-id: https://develop.svn.wordpress.org/trunk@38411 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/functions.php

@@ -561,8 +561,6 @@ function do_enclose( $content, $post_ID ) {
 	global $wpdb;
 
 	//TODO: Tidy this ghetto code up and make the debug code optional
-	include_once( ABSPATH . WPINC . '/class-IXR.php' );
-
 	$post_links = array();
 
 	$pung = get_enclosed( $post_ID );