Update to NixOS 25.05

machines/blocktech/configuration.nix

@@ -6,10 +6,6 @@
   config,
   ...
 }: {
-  options = {
-    pim.cosmic.enable = lib.mkEnableOption "cosmic";
-  };
-
   config = {
     pim = {
       lanzaboote.enable = false;
@@ -80,24 +76,5 @@
       loader.systemd-boot.enable = true;
       loader.efi.canTouchEfiVariables = true;
     };
-
-    nix.settings = {
-      substituters = ["https://cosmic.cachix.org/"];
-      trusted-public-keys = ["cosmic.cachix.org-1:Dya9IyXD4xdBehWjrkPv6rtxpmMdRel02smYzA85dPE="];
-    };
-
-    specialisation.cosmic = lib.mkIf config.pim.cosmic.enable {
-      configuration = {
-        imports = [
-          inputs.nixos-cosmic.nixosModules.default
-        ];
-
-        services = {
-          desktopManager.cosmic.enable = true;
-          displayManager.cosmic-greeter.enable = true;
-          services.xserver.videoDrivers = ["nvidia"];
-        };
-      };
-    };
   };
 }