How to Hide Smart Manager - Advanced WooCommerce Bulk Edit & Inventory Management Admin Menus

function plt_hide_smart_manager_for_wp_e_commerce_menus() {
	//Hide "Smart Manager".
	remove_menu_page('smart-manager');
	//Hide "Smart Manager → Smart Manager".
	remove_submenu_page('smart-manager', 'smart-manager');
	//Hide "Smart Manager → 🔥  Go Pro".
	remove_submenu_page('smart-manager', 'smart-manager-pricing');
	//Hide "Smart Manager → Docs & Support".
	remove_submenu_page('smart-manager', 'smart-manager&landing-page=sm-about');
	//Hide "Smart Manager → StoreApps Plugins".
	remove_submenu_page('smart-manager', 'sm-storeapps-plugins');
}

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

Where do I put this code?