use xfs for systemd tests

bluestore options dont work yet as the tests use
ceph-deploy to setup cluster and they still assume
either xfs or btrfs

Signed-off-by: Vasu Kulkarni <vasu@redhat.com>

diff --git a/qa/suites/smoke/systemd/bluestore.yaml b/qa/suites/smoke/systemd/bluestore.yaml
deleted file mode 120000 (symlink)
index e9c941b..0000000
--- a/qa/suites/smoke/systemd/bluestore.yaml
+++ /dev/null
@@ -1 +0,0 @@
-../../../objectstore/bluestore.yaml
\ No newline at end of file