tests: remove 1 osd node for upgrade scenario

This node was needed for the upgrade job in stable-4.0.
Since we moved the code erasure pool testing in lvm_osds, we don't need
to fire up that node anymore.
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

tests/functional/all_daemons/hosts-upgrade-to-nautilus

@@ -10,7 +10,6 @@ mgr0
 osd0 osd_crush_location="{ 'root': 'HDD', 'rack': 'mon-rackkkk', 'pod': 'monpod', 'host': 'osd0' }"
 osd1 osd_crush_location="{ 'root': 'default', 'host': 'osd1' }"
 osd2 osd_crush_location="{ 'root': 'default', 'host': 'osd2' }"
-osd3 osd_crush_location="{ 'root': 'default', 'host': 'osd3' }"
 
 [mdss]
 mds0