davmail: Revert "fix: temp zulu davmail"

  libxtst,

  coreutils,

  gnugrep,

  zulu,

  preferGtk3 ? true,

  preferZulu ? false,

}:

let

  jre' = jdk.override { enableJavaFX = true; };

  jre' = (if preferZulu then zulu else jdk).override { enableJavaFX = true; };

  gtk' = if preferGtk3 then gtk3 else gtk2;

in

stdenv.mkDerivation (finalAttrs: {