util: remove dead code KTimeCmp

util: remove dead code KTimeCmp

This routine has been dead code since the original IBM code import.  It
was ifdef'd out in commit 45376df63f7f util-warning-cleanup-20011005.

Remove the dead code from the tree.

No functional change is incurred by this commit.

Change-Id: I33689db8e016e1dd5abb88910af8da6208a75ce6
Reviewed-on: https://gerrit.openafs.org/14334
Reviewed-by: Cheyenne Wills <cwills@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>