LU-7950 osp: Remove assigned but not used variable

LU-7950 osp: Remove assigned but not used variable

This patch removes import variable which were assigned but
were not used within function
1. lwp_device_fini() under lustre/osp/lwp_dev.c
2. osp_device_fini() under lustre/osp/osp_dev.c

Signed-off-by: Arshad Hussain <arshad.hussain@seagate.com>
Change-Id: If37bc78060aaf97127802c0fcbf50bc5483977fc
Reviewed-on: http://review.whamcloud.com/21024
Tested-by: Jenkins
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>