Remove sddm_midnight theme.

pkgs/sddm_midnight/default.nix

@@ -1,33 +0,0 @@
-{
-  stdenv,
-  fetchFromGitHub,
-  qtstyleplugin-kvantum-qt4,
-}:
-stdenv.mkDerivation {
-  name = "sddm_midnight";
-  version = 1.0;
-
-  src = fetchFromGitHub {
-    owner = "Rokin05";
-    repo = "midnight-kde";
-    rev = "1a4771146a8d6f3b45b1da32877495c9e562d193";
-    sha256 = "10br96pf4dppk9nk7yvf7h9zja40k4c6rhwmqcaxxcjlhpvjmhkj";
-  };
-
-  buildInputs = [qtstyleplugin-kvantum-qt4];
-
-  patchPhase = ''
-    substituteInPlace sddm/themes/Midnight/Main.qml --replace /usr $out
-  '';
-
-  installPhase = ''
-    mkdir -p $out/share
-    cp -R \
-        "aurorae" \
-        "color-schemes" \
-        "Kvantum" \
-        "plasma" \
-        "sddm" \
-        "$out/share"
-  '';
-}

pkgsets/xpkgs.nix

@@ -9,7 +9,6 @@ in {
     acpilight
     feh
     scrot
-    theme_sddm_midnight
     dconf
     alacritty
     gnome3.gvfs