How to Hide the "No Weak Passwords" Admin Menu

function plt_hide_no_weak_passwords_menus() {
	//Hide the "Settings → No Weak Passwords" menu.
	remove_submenu_page('options-general.php', 'no_weak_passwords');
}

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

Where do I put this code?