What?! You can neither delete nor edit your review once it’s posted and Airbnb does not allow the guest and host to mutually withdraw reviews (e.g., Like eBay). And every host for the past 2+ years says the only way to get a review removed is if it violates Airbnb’s terms or service.
Are you saying Airbnb called you on behalf of the guest and asked if you would withdraw your review? If so, when did this take place?