Move registration.php functions to user.php. Deprecate registration.php, everything is now included by default. fixes #13761.

git-svn-id: https://develop.svn.wordpress.org/trunk@16009 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/user-new.php

@@ -15,9 +15,6 @@ if ( !current_user_can('create_users') )
 if ( is_multisite() && !get_site_option( 'add_new_users' ) )
 	wp_die( __('Page disabled by the administrator') );
 
-/** WordPress Registration API */
-require_once( ABSPATH . WPINC . '/registration.php');
-
 if ( is_multisite() ) {
 	function admin_created_user_email( $text ) {
 		/* translators: 1: Site name, 2: site URL, 3: role */