Move NFS server to sparky.

hosts/zippy/default.nix

@@ -5,12 +5,6 @@
     ../../common/global
     ../../common/cluster-member.nix  # Consul + storage clients
     ../../common/nomad-worker.nix     # Nomad client (runs jobs)
-    # NOTE: zippy is NOT a server - no nomad-server.nix import
-    ../../common/nfs-services-server.nix  # NFS server for /data/services
-    # To move NFS server role to another host:
-    # 1. Follow procedure in docs/NFS_FAILOVER.md
-    # 2. Replace above line with: ../../common/nfs-services-standby.nix
-    # 3. Add nfsServicesStandby.replicationKeys with the new server's public key
     ./hardware.nix
   ];
 
@@ -22,8 +16,4 @@
 
   networking.hostName = "zippy";
   services.tailscaleAutoconnect.authkey = "tskey-auth-ktKyQ59f2p11CNTRL-ut8E71dLWPXsVtb92hevNX9RTjmk4owBf";
-
-  nfsServicesServer.standbys = [
-    "sparky"
-  ];
 }