move locale, add host option

modules/nixos/system/default.nix

@@ -1,7 +1,6 @@
 {
   imports = [
     ./common.nix
-    ./locale.nix
     ./misc
     ./stylix
     ./virt

modules/nixos/system/locale.nix

@@ -1,36 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}: let
-  inherit (lib) types mkOption;
-in {
-  options = {
-    module.locale = mkOption {
-      type = types.strMatching "[a-z]{2}_[A-Z]{2}\\.UTF-8";
-      default = "en_US.UTF-8";
-      description = "set locale";
-    };
-  };
-  config = {
-    i18n = let
-      inherit (config.module) locale;
-    in {
-      defaultLocale = locale;
-      extraLocaleSettings = {
-        LC_ADDRESS = locale;
-        LC_COLLATE = "en_US.UTF-8";
-        LC_CTYPE = locale;
-        LC_IDENTIFICATION = locale;
-        LC_MEASUREMENT = locale;
-        LC_MESSAGES = locale;
-        LC_MONETARY = locale;
-        LC_NAME = locale;
-        LC_NUMERIC = locale;
-        LC_PAPER = locale;
-        LC_TELEPHONE = locale;
-        LC_TIME = locale;
-      };
-    };
-  };
-}