confmon: don't poison clconfig memory space

We already have an assertion at the top telling us that the refcount
must be > 0

Change-Id: Ie4a508072fadec6a33533314ad4397cfcd67d55a
Reviewed-on: http://review.couchbase.org/32912
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>