How to Hide the "WP Site Status Client" Admin Menu

function plt_hide_wp_site_status_client_menus() {
	//Hide the "Settings → WP Site Status Client" menu.
	remove_submenu_page('options-general.php', 'wp_site_status_client');
}

add_action('admin_menu', 'plt_hide_wp_site_status_client_menus', 11);

Where do I put this code?