remove nix-topology

machines/genepi/configuration.nix

@@ -18,7 +18,6 @@
     ./pinchflat.nix
     ./syncthing.nix
     ./taskchampion.nix
-    ./topology.nix
 
     ../../modules/acme-home.nix
     ../../modules/lounge.nix

machines/genepi/topology.nix

@@ -1,24 +0,0 @@
-{ config, ... }:
-let
-  inherit (config.lib.topology)
-    mkConnection
-    ;
-in
-{
-  topology.self = {
-    hardware.info = "Raspberry Pi 4B";
-    interfaces = {
-      tailscale0 = {
-        type = "wireguard";
-        network = "tailscale";
-      };
-      enp1s0 = {
-        type = "ethernet";
-        network = "home";
-        physicalConnections = [
-          (mkConnection "cassoulet" "eth1")
-        ];
-      };
-    };
-  };
-}