feat: remove module attribute and fix duplicate import

modules/lib/helpers.nix

@@ -44,8 +44,7 @@ let
     in
     {
       imports = [
-        nixosModules.host-base
-        machine.module
+        nixosModules.${machine.name}
       ];
 
       meta.machine = machine;

modules/lib/schema.nix

@@ -1,7 +1,5 @@
-{ lib, config, ... }:
+{ lib, ... }:
 let
-  nixosModules = config.flake.modules.nixos;
-
   sourceControlScopeType = lib.types.enum [
     "personal"
     "work"
@@ -177,11 +175,6 @@ let
           default = name;
         };
 
-        module = lib.mkOption {
-          type = lib.types.deferredModule;
-          default = nixosModules.${name};
-        };
-
         stateVersion = lib.mkOption {
           type = lib.types.str;
         };