nixos/cardboard: drop

Corresponding package has been marked broken for a full release cycle.

Dropping per RFC 180.

nixos/doc/manual/release-notes/rl-2511.section.md

@@ -174,6 +174,8 @@
 
 - `programs.goldwarden` has been removed, due to the software not working with newer versions of the Bitwarden and Vaultwarden servers, as well as it being abandoned upstream.
 
+- The `cardboard` package and `programs.cardboard` module were removed due to the package having been broken since at least November 2024.
+
 - The default `kops` version is now 1.33.0 and versions 1.30 and older have been dropped. See [Upgrading Kubernetes](https://kops.sigs.k8s.io/tutorial/upgrading-kubernetes/) for instructions on how to update kOps.
 
 - `programs.skim.fuzzyCompletions` has been removed in favor of adding the completions to the package itself.

nixos/modules/module-list.nix

@@ -337,7 +337,6 @@
   ./programs/vivid.nix
   ./programs/vscode.nix
   ./programs/wavemon.nix
-  ./programs/wayland/cardboard.nix
   ./programs/wayland/dwl.nix
   ./programs/wayland/gtklock.nix
   ./programs/wayland/hyprland.nix

nixos/modules/programs/wayland/cardboard.nix

@@ -1,31 +0,0 @@
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}:
-
-let
-  cfg = config.programs.cardboard;
-in
-{
-  meta.maintainers = with lib.maintainers; [ ];
-
-  options.programs.cardboard = {
-    enable = lib.mkEnableOption "cardboard";
-
-    package = lib.mkPackageOption pkgs "cardboard" { };
-  };
-
-  config = lib.mkIf cfg.enable (
-    lib.mkMerge [
-      {
-        environment.systemPackages = [ cfg.package ];
-
-        # To make a cardboard session available for certain DMs like SDDM
-        services.displayManager.sessionPackages = [ cfg.package ];
-      }
-      (import ./wayland-session.nix { inherit lib pkgs; })
-    ]
-  );
-}

nixos/modules/rename.nix

@@ -58,6 +58,10 @@ in
       "networking"
       "wicd"
     ] "The corresponding package was removed from nixpkgs.")
+    (mkRemovedOptionModule [
+      "programs"
+      "cardboard"
+    ] "The corresponding package was removed from nixpkgs.")
     (mkRemovedOptionModule [
       "programs"
       "gnome-documents"