How to Hide the "Temporary Logins" Admin Menu

function plt_hide_temporary_login_without_password_menus() {
	//Hide the "Users → Temporary Logins" menu.
	remove_submenu_page('users.php', 'wp-temporary-login-without-password');
}

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

Where do I put this code?