[rennes][srv-bigdata] remove group storage storage1

data/grid5000/sites/rennes/servers/srv-bigdata.json

 {
   "alias": [
     "storage",
-    "storage1",
     "modules"
   ],
-  "group_storage": {
-    "name": "storage1",
-    "rate": 10000000000,
-    "size": 100000000000000
-  },
   "kind": "physical",
   "network_adapters": {
     "bmc": {

input/grid5000/sites/rennes/servers/servers.yaml

@@ -16,7 +16,6 @@ srv-bigdata:
   kind: physical
   alias:
     - storage
-    - storage1
     - modules
   warranty: 2018-10
   serial: 6V9FGZ1
@@ -25,10 +24,6 @@ srv-bigdata:
       ip: 172.16.111.7
     bmc:
       ip: 172.17.111.7
-  group_storage:
-    name: storage1
-    size: 100000000000000
-    rate: 10000000000
 
 rook-storage0:
   kind: physical