How to Hide One Click SEO Optimizer Admin Menus

function plt_hide_one_click_seo_optimizer_menus() {
	//Hide "OneClick SEO".
	remove_menu_page('oneclickseo');
	//Hide "OneClick SEO → OneClick SEO".
	remove_submenu_page('oneclickseo', 'oneclickseo');
	//Hide "OneClick SEO → Contact Us".
	remove_submenu_page('oneclickseo', 'oneclickseo-contact');
	//Hide "OneClick SEO → Upgrade".
	remove_submenu_page('oneclickseo', 'oneclickseo-pricing');
}

add_action('admin_menu', 'plt_hide_one_click_seo_optimizer_menus', 1000000000);

Where do I put this code?