Moving back to USA. Relinquish visa or BRP?

Hi all,

I've recently moved back to the USA. I have maybe an easy question but can't find an answer.

Do I need to alert the Home Office that I've moved back or officially relinquish my BRP card? My spouse visa is still active for almost 24 months but do I need to do anything to officially say I've left and won't be renewing?

Just want to make sure I don't do anything wrong that would affect me visiting as a tourist in the future.

Thanks so much for any help provided!