AFAIK, that's not necessarily GDPR, you still need to have a cookie notice for third-party cookies, even if your third-party cookies don't collect PII.

But as others have said, you don't need a cookie notice of all you're using is necessary cookies.

Plus in the UK the ICO is underfunded, has a low enforcement record and is now sending menacing, misleading, letters demanding £40 from every UK business even though 90% of them don't actually need to pay the fee.