flake.nix: remove explicit builders

there are better ways to use builders

flake.nix

@@ -74,17 +74,10 @@
             # Can be run with nix run c3d2#deploy-…
             { name
             , host
-            # remote builders to pass
-            , builders ? null
             }:
             let target = "root@${host}";
                 rebuildArg =
-                  "--flake ${self}#${name}" +
-                  (if builders != null
-                   then " --builders \"" +
-                        builtins.concatStringsSep " " builders +
-                        "\""
-                   else "");
+                  "--flake ${self}#${name}";
             in pkgs.writeScriptBin "${name}-nixos-rebuild" ''
               #!${pkgs.runtimeShell} -e
               nix-copy-closure --to ${target} ${secrets}
@@ -146,8 +139,6 @@
           "${name}-nixos-rebuild" = mkDeploy ({
             inherit name;
             host = getHostAddr name;
-          } // nixpkgs.lib.optionalAttrs (hostRegistry.hosts.${name} ? builders) {
-            inherit (hostRegistry.hosts.${name}) builders;
           });
 
           "${name}-nixos-rebuild-local" =

host-registry.nix

@@ -20,7 +20,6 @@ rec {
       ether = "dc:a6:32:31:b6:32";
       publicKey =
         "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE9RKlt+mIew5epxHt7Gab44yFOdeD+L/EhhA6Ospzyq";
-      builders = [ "ssh://client@172.22.99.110" ];
       wol = true;
       ip4 = "pulsebert.hq.c3d2.de";
     };