Remove the old new token interface

Remove the old new token interface

ktc.c has had for a long, long time a 'new' token interface, which
was only enabled if KERNEL_KTC_COMPAT is set. However, this is never
defined in our tree, relies on a syscall that just won't work on
platforms such as Linux, and won't support any of the new token
formats we're planning. So, just remove this interface from our
code - it's in version control should we want to revisit it in the
future.

Change-Id: Iab3dd04498799f061449a50bdac39c6407a9fdd7
Reviewed-on: http://gerrit.openafs.org/1318
Reviewed-by: Marc Dionne <marc.c.dionne@gmail.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>