system: move all to defaults

system/lix.nix

@@ -1,33 +0,0 @@
-{
-  pkgs,
-  lib,
-  config,
-  ...
-}:
-
-let
-  name = "lix";
-  cfg = config.nixowos.system.${name};
-in
-{
-  options.nixowos.system.${name} = {
-    enable = lib.mkEnableOption name;
-  };
-
-  config = lib.mkIf cfg.enable {
-    # use lix, a fork of nix
-    # see: https://lix.systems/about
-    nix.package = pkgs.lixPackageSets.stable.lix;
-    # overlays so that all nix tools use lix
-    nixpkgs.overlays = [
-      (final: prev: {
-        inherit (prev.lixPackageSets.stable)
-          nixpkgs-review
-          nix-eval-jobs
-          nix-fast-build
-          colmena
-          ;
-      })
-    ];
-  };
-}