ptserver: Remove some unnecessary assignments

Remove some assignments where we do nothing with the results

Caught by clang-analyzer

Change-Id: I6990a6b21ced10500275176af3f85b7f1cabd334
Reviewed-on: http://gerrit.openafs.org/9177
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>