How to Hide the "Woo Quote Popup" Admin Menu

function plt_hide_gm_woocommerce_quote_popup_menus() {
	//Hide the "Woo Quote Popup" menu.
	remove_menu_page('GMWQP');
}

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

Where do I put this code?