staging: kpc2000: removed two kpc_uio_class device attributes.

The show functions of two attributes output nothing and they are unused.
Removed them.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Reported-by: Matt Sickler <matt.sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>