Windows: do not leak cm_volume_t objects from LRU queue

Windows: do not leak cm_volume_t objects from LRU queue

The LRU queue is where volume objects are recycled from.
Therefore if they are removed then they must be put back.

Remove extraneous operations from cm_AdjustVolumeLRU().

LICENSE MIT

Reviewed-on: http://gerrit.openafs.org/2913
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
(cherry picked from commit 77456c07945659ff1254732aa8e428e6301e5ee6)
Change-Id: I0de6b6cfe1598ae09471b25a506f34bfe577c2a7
Reviewed-on: http://gerrit.openafs.org/3052
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>