Review and possibly remove legacy consumer-buffer logic in PassiveStream::messageRecevied

    case KVBucket::ReplicationThrottleStatus::Pause: {

        forceMessage(*dcpResponse).getError();

        // @todo MB-60439: Review and possibly remove.

        //  Legacy active check for preventing that we consume memory by

        //  buffering message for dead streams are being removes. We can

        //  probably remove the check once we get rid of the buffer.

        if (isActive()) {

            unackedBytes += ufc.release();

        }

        return cb::engine_errc::temporary_failure;

    }