function plt_hide_wp_stateless_menus() {
//Hide the "Media → Stateless Setup" menu.
remove_submenu_page('upload.php', 'stateless-setup');
//Hide the "Media → Stateless Settings" menu.
remove_submenu_page('upload.php', 'stateless-settings');
}
add_action('admin_menu', 'plt_hide_wp_stateless_menus', 1000);