LU-5275 obdclass: Remove lprocfs_vars argument from class_register_type function

LU-5275 obdclass: Remove lprocfs_vars argument from class_register_type function

Lustre no longer uses struct lprocfs_vars with any instance
of class_register_type function. We can safely remove it.

Change-Id: Ia4ecabab4f286bfe9991d1a860e2485694fca5d0
Signed-off-by: James Simmons <uja.ornl@gmail.com>
Reviewed-on: http://review.whamcloud.com/11640
Tested-by: Jenkins
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>