Deleted Hosts in 3.4 Ops Manager docs

When hosts are removed from an Ops Manager group they go into the Deleted Hosts lists, now under the 'More' drop down in the Deployment UI.

I cant find a reference to this in the 3.4 docs.

When hosts are in the deleted hosts list they are effectively blacklisted and cant be re-used. I can't find a reference to deleted hosts in the 3.4 documentaton.

I found this Ops Manager 1.6 docs link which mentions Deleted Hosts, but the equivalent page isn't available in the 3.4 docs.

https://docs.opsmanager.mongodb.com/v1.6/tutorial/remove-hosts/