- Move the (remaining) privacy tools related functions from `wp-admin/includes/file.php` to `wp-admin/includes/privacy-tools.php`.
- Move the `WP_User_Request` class to a separate file.
See #43895.
git-svn-id: https://develop.svn.wordpress.org/trunk@45519 602fd350-edb4-49c9-b593-d223f7449a82