staging: lustre: remove cruft from libcfs/linux/libcfs.h

These defines are unused or nearly unused, and do not
help at all.

Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>