staging: lustre: remove unused "helper" macros

This removes a bunch of unused helper macros in the kp30.h file as they
were not being used anywhere, and they better not be used in the future.

Cc: Peng Tao <tao.peng@emc.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>