more cleanup

systems/x86_64-linux/nuc/default.nix

@@ -1,5 +1,4 @@
 {
-  lib,
   namespace,
   ...
 }:
@@ -49,28 +48,4 @@
     };
   };
 
-  # Enable nix flakes and nix-command tools
-  nix = {
-    settings = {
-      substituters = [
-        "https://nix-community.cachix.org"
-        "https://cache.nixos.org/"
-      ];
-      trusted-public-keys = [
-        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-      ];
-      warn-dirty = lib.mkForce false;
-      experimental-features = lib.mkForce [
-        "nix-command"
-        "flakes"
-      ];
-      trusted-users = [ "@wheel" ];
-    };
-
-    # Garbage collect automatically every week
-    gc.automatic = lib.mkDefault true;
-    gc.options = lib.mkDefault "--delete-older-than 30d";
-
-    optimise.automatic = lib.mkDefault true;
-  };
 }