[rennes][servers] remove no more used servers

data/grid5000/accesses/refrepo.json

@@ -67926,7 +67926,7 @@
                   "interface": "Ethernet",
                   "ip": "172.16.69.12",
                   "ip6": "2001:660:4406:500:6::c",
-                  "kavlan": false,
+                  "kavlan": true,
                   "mac": "30:3e:a7:02:bf:54",
                   "management": false,
                   "model": "Ethernet Controller E810-XXV for SFP",