MB-100: Remove inconsistent checkpoint option

Change-Id: Ifde10bc40f58a52d030c060a65084300d89deee9
Reviewed-on: http://review.couchbase.org/27200
Reviewed-by: Chiyoung Seo <chiyoung.seo@gmail.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>