JCBC-566: Remove dead code blocking configuration updates

In this patch http://review.couchbase.org/32589 Resubscriber class was
removed, but its flag was not. So the boolean state is never changed
here.

Change-Id: I9509e207d1c1c9215ac22de0bd57022dd9270aec
Reviewed-on: http://review.couchbase.org/41741
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>