bozo: Remove unused error codes assignments

bozo: Remove unused error codes assignments

This removes a couple of unreported error code assignments. Firstly,
the return from 'setsid' was being assigned to 'ec' and promptly
ignored, and secondly, the response from SendNotifierData was
being ignored. As there is nothing sensible to do with these error
codes, just ignore them properly.

Change-Id: Ifff8c7b5b7950e467570d26ce5f92fe5f11a51e9
Reviewed-on: http://gerrit.openafs.org/4993
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>