tests: drop upgrade/hammer-jewel-x

This suite doesn't have any test logic in it. Its existence in the jewel branch
appears to be an oversight.

This cannot be cherry-picked from master because the upgrade/hammer-jewel-x
suite is present (and justified) in master and is not currently being dropped
there.

Signed-off-by: Nathan Cutler <ncutler@suse.com>

diff --git a/qa/suites/upgrade/hammer-jewel-x/parallel/distros/centos.yaml b/qa/suites/upgrade/hammer-jewel-x/parallel/distros/centos.yaml
deleted file mode 120000 (symlink)
index f607908..0000000
--- a/qa/suites/upgrade/hammer-jewel-x/parallel/distros/centos.yaml
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../distros/all/centos.yaml
\ No newline at end of file

diff --git a/qa/suites/upgrade/hammer-jewel-x/stress-split/distros/centos.yaml b/qa/suites/upgrade/hammer-jewel-x/stress-split/distros/centos.yaml
deleted file mode 120000 (symlink)
index f607908..0000000
--- a/qa/suites/upgrade/hammer-jewel-x/stress-split/distros/centos.yaml
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../distros/all/centos.yaml
\ No newline at end of file