How to Hide Best Rating & Pageviews Admin Menus

function plt_hide_best_rating_pageviews_menus() {
	//Hide the "Statistics" menu.
	remove_menu_page('best-rating-pageviews');
	//Hide the "Statistics → Statistics" menu.
	remove_submenu_page('best-rating-pageviews', 'best-rating-pageviews');
	//Hide the "Statistics → Settings" menu.
	remove_submenu_page('best-rating-pageviews', 'best-rating-pageviews-settings-page');
}

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

Where do I put this code?