Windows: cm_UpdateCell never applies to Freelance mode

Windows: cm_UpdateCell never applies to Freelance mode

The Freelance.Local.Cell is updated by the registry monitor
thread and cm_UpdateCell should be a no-op.  Make it so.

Reviewed-on: http://gerrit.openafs.org/6791
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
(cherry picked from commit cfb7f205d8153899c0165594a29d91926a40425d)

Change-Id: I2607ea87ebcc849474f4e0a183d7ad4eba121de9
Reviewed-on: http://gerrit.openafs.org/6829
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>