i18n: Remove commented-out env variables

modules/services/i18n/default.nix

@@ -12,12 +12,5 @@ in {
       enabled = "fcitx";
       ibus.engines = with pkgs.ibus-engines; [ mozc ];
     };
-
-    #environment.variables = {
-    #  # TODO: Use pam_environment
-    #  "GTK_IM_MODULE" = "xim";
-    #  "XMODIFIERS" = "@im=ibus";
-    #  "QT_IM_MODULE" = "xim";
-    #};
   };
 }