Disable the email module for lutea

I'm not actually using these packages right now and they are causing
build errors

lutea/config.nix

···
     ../modules/creation.nix
     ../modules/editor.nix
     ../modules/electron.nix
-    ../modules/email.nix
+    # ../modules/email.nix
     ../modules/flatpak.nix
     ../modules/fonts.nix
     ../modules/fwupd.nix