Remove no longer needed fields from #state{} record

There were two fields left over from previous implementation
try-outs. They are not used in the current implementation.

Change-Id: I153961893798114c8f1ad2066e664f51309f4056
Reviewed-on: http://review.couchbase.org/33751
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: buildbot <build@couchbase.com>