Don't list the instance among the sites, mailchmip #3925
Mailchimp deletion change #3925

Subscriptions tied to multiple servers will only be unsubbed on user deletion when the user runs out of servers.   ie if you're on scholar and projects, deleting your projects account will update mailchimp but not delete the sub.
Merge pull request #4192 from openscholar/3925-mailchimp

Don't list the instance among the sites, mailchmip #3925