Decommission a monitored host

What are thoughts on the best way to decommission a monitored server in hobbit? I would like to remove it from monitoring since it no longer exists. But want to keep all historical hobbit data for the server incorporated into all reports for "X" amount of time. Then retire this data off after that "X" amount of time to some kind of historical archive so its still available if needed. Maybe using some kind of historical reporting tool in hobbit.

Anyone doing anything similar or have thoughts on the best way to achieve this?

Thanks Trent