chore: replace nixos-generators image outputs

lib/nixosSystem.nix

@@ -10,15 +10,12 @@
   ...
 }:
 let
-  inherit (inputs) nixpkgs home-manager nixos-generators;
+  inherit (inputs) nixpkgs home-manager;
 in
 nixpkgs.lib.nixosSystem {
   inherit system specialArgs;
   modules =
     nixos-modules
-    ++ [
-      nixos-generators.nixosModules.all-formats
-    ]
     ++ (lib.optionals ((lib.lists.length home-modules) > 0) [
       home-manager.nixosModules.home-manager
       {