MB-100: Remove unused parameter from queueDirty function

Change-Id: I51a13878eb975835ae44edf48e986f4be9c1edea
Reviewed-on: http://review.couchbase.org/27153
Reviewed-by: Jin Lim <jin@couchbase.com>
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>