LU-6142 lov: discard unused lov_dump_lmm* functions

LU-6142 lov: discard unused lov_dump_lmm* functions

lov_dump_lmm() and lov_dump_lmm_v3() are never used, so remove them.

So mark lov_lsm_pack_v1v3() and lov_lsm_pack_foreign() as static.

Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I013c265819e7e139a9878e9e0aa18022519bd2fe
Reviewed-on: https://review.whamcloud.com/39378
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>