[kwollect] remove last references to kwollect-bullseye VMs

data/grid5000/sites/lille/servers/kwollect-bullseye.json

-{
-  "kind": "virtual",
-  "network_adapters": {
-    "default": {
-      "ip": "172.16.47.167"
-    }
-  },
-  "type": "server",
-  "uid": "kwollect-bullseye"
-}
\ No newline at end of file