How to Hide the "Uber Login Logo" Admin Menu

function plt_hide_uber_login_logo_menus() {
	//Hide the "Settings → Uber Login Logo" menu.
	remove_submenu_page('options-general.php', 'uber-login-logo/uber-login-logo.php');
}

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

Where do I put this code?