staging/lustre/lov: remove unused lov llog code

staging/lustre/lov: remove unused lov llog code

Remove the unused functions lov_llog_init(), lov_llog_finish(),
their supporting functions, and the file lov_log.c.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Reviewed-on: http://review.whamcloud.com/8539
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-2675
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>