block/031: remove the fio verify.state file

Add fio option --verify_state_save to not save the verify.state file

Suggested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Yi Zhang <yi.zhang@redhat.com>

tests/block/031

@@ -45,8 +45,9 @@ test() {
 		--ioengine=libaio --runtime="${TIMEOUT}" --thread \
 		--name=block-031 --filename=/dev/nullb1 \
 		--output="${RESULTS_DIR}/block/fio-output-031.txt" \
-		>>"$FULL"
+		--verify_state_save=0 >>"$FULL"
 	fio_status=$?
+	rm -f local*verify*state
 	rmdir /sys/kernel/config/nullb/nullb1
 	_exit_null_blk
 	case $fio_status in