Remove klogin

It has not been connected to the build since at least the 1.2 days
and should be considered dead code.

FIXES 131777

Change-Id: Id1551e7f9f543934dc8755a29f46aa7b905bfadd
Reviewed-on: http://gerrit.openafs.org/10522
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>