Remove wixos (WSL) configuration

WSL is no longer used. This removes:
- machines/wixos/ directory and configuration.nix
- nixos-wsl input from flake.nix
- nixosConfigurations.wixos output
- References to wixos in AGENTS.md and .goosehints

Implements bead: nixos-configs-2mk

flake.nix

@@ -4,8 +4,7 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
-    nixos-wsl.url = "github:nix-community/NixOS-WSL/main";
-    
+
     nix-darwin = {
       url = "github:nix-darwin/nix-darwin/nix-darwin-25.11";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -55,7 +54,7 @@
     };
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, nixos-wsl, ... } @ inputs: let
+  outputs = { self, nixpkgs, nixpkgs-unstable, ... } @ inputs: let
     nixosModules = [
       ./roles
     ] ++ [
@@ -176,19 +175,6 @@
       ];
     };
 
-    nixosConfigurations.wixos = nixpkgs.lib.nixosSystem rec {
-      system = "x86_64-linux";
-      modules = nixosModules ++ [
-        nixos-wsl.nixosModules.default
-        ./machines/wixos/configuration.nix
-        inputs.home-manager.nixosModules.home-manager
-        {
-          home-manager.users.johno = import ./home/home-desktop.nix;
-          home-manager.extraSpecialArgs = { inherit system; };
-        }
-      ];
-    };
-
     nixosConfigurations.zix790prors = nixpkgs.lib.nixosSystem rec {
       system = "x86_64-linux";
       modules = nixosModules ++ [