worf: fix rebuild issues. Remove voyager builder

hosts/worf/configuration.nix

@@ -16,29 +16,20 @@
     settings = {
       allow-dirty = true;
       experimental-features = [ "nix-command" "flakes" "repl-flake" ];
-      auto-optimise-store = true;
       builders-use-substitutes = true;
       log-lines = 50;
+
+      # https://github.com/NixOS/nix/issues/7273
+      # auto-optimise-store = true;
     };
 
     buildMachines = [
-      {
-        hostName = "voyager.home.feal.no";
-        system = "x86_64-linux";
-
-        maxJobs = 4;
-        supportedFeatures = [ "kvm" "big-parallel" "benchmark" "nixos-test" ];
-        mandatoryFeatures = [ ];
-
-        sshUser = "felixalb";
-        sshKey = "/var/root/.ssh/nix-builder";
-      }
       {
         hostName = "defiant.home.feal.no";
         system = "x86_64-linux";
 
         maxJobs = 6;
-        supportedFeatures = [ "big-parallel" "benchmark" "nixos-test" ];
+        supportedFeatures = [ "kvm" "big-parallel" "benchmark" "nixos-test" ];
         mandatoryFeatures = [ ];
 
         sshUser = "felixalb";