How to Hide Spreadsheet Price Change for WooCommerce and WP E-commerce - Light Admin Menus

function plt_hide_excel_like_price_change_for_woocommerce_and_wp_e_commerce_light_menus() {
	//Hide the "Excel-Like Price Manager" menu.
	remove_menu_page('excellikepricechangeforwoocommerceandwpecommercelight-root');
	//Hide the "Excel-Like Price Manager → Excel-Like Price Manager" menu.
	remove_submenu_page('excellikepricechangeforwoocommerceandwpecommercelight-root', 'excellikepricechangeforwoocommerceandwpecommercelight-root');
	//Hide the "Excel-Like Price Manager → Settings" menu.
	remove_submenu_page('excellikepricechangeforwoocommerceandwpecommercelight-root', 'excellikepricechangeforwoocommerceandwpecommercelight-settings');
}

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

Where do I put this code?