drop optionsNix

nixosModules/clanCore/options.nix

@@ -1,6 +1,4 @@
 {
-  pkgs,
-  options,
   lib,
   ...
 }:
@@ -11,14 +9,4 @@
       "core"
     ])
   ];
-  options.clan.core.optionsNix = lib.mkOption {
-    type = lib.types.raw;
-    internal = true;
-    readOnly = true;
-    default = (pkgs.nixosOptionsDoc { inherit options; }).optionsNix;
-    defaultText = "optionsNix";
-    description = ''
-      This is to export nixos options used for `clan config`
-    '';
-  };
 }