LU-8366 test: Remove PIOS tests

LU-8366 test: Remove PIOS tests

PIOS is an old benchmark and is not open source. PIOS should
be removed from sanity-benchmark.

Test-Parameters: trivial testlist=sanity-benchmark
Signed-off-by: James Nunez <james.a.nunez@intel.com>
Change-Id: Id89ab1107e4d7e444f6149d04bd90b4ea8c7828b
Reviewed-on: https://review.whamcloud.com/26014
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Cliff White <cliff.white@intel.com>