Nix: Update flake lockfile

nix/flake.nix

@@ -5,10 +5,6 @@
 
     home-manager.url = "github:nix-community/home-manager";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
-    home-manager.inputs.utils.follows = "utils";
-
-    # mach-nix.url = "mach-nix/3.5.0";
-    # mach-nix.inputs.nixpkgs.follows = "nixpkgs";
   };
 
   outputs = {
@@ -16,12 +12,10 @@
       nixpkgs,
       utils,
       home-manager,
-      # mach-nix,
       ...}: let
     pkgsForSystem = (system: import nixpkgs {
       inherit system;
       overlays = [
-        # self.overlays."${system}".xonsh_with_plugins
       ];
       config.allowUnfree = true;
     });
@@ -42,7 +36,6 @@
     });
   in
     utils.lib.eachDefaultSystem (system: {
-      # overlays.xonsh_with_plugins = import ./overlays/xonsh.nix { mach-nix = mach-nix.lib."${system}"; };
       legacyPackages.homeConfigurations.std = mkHomeConfig { inherit system; };
     });
 }