How to Hide the "WP Hide" Admin Menu

function plt_hide_wp_hide_updates_notifications_and_warnings_menus() {
	//Hide the "WP Hide" menu.
	remove_menu_page('wphpuw');
}

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

Where do I put this code?