How to Hide Pareto Security Admin Menus

function plt_hide_pareto_security_menus() {
	//Hide the "Settings → Pareto Security Dashboard" menu.
	remove_submenu_page('options-general.php', 'pareto_security_settings');
	//Hide the "Pareto Security" menu.
	remove_menu_page('pareto_security_settings');
}

add_action('admin_menu', 'plt_hide_pareto_security_menus', 21);

Where do I put this code?