overlays: remove 'sabnzbd-fix-missing-packages'

The upstream nixpkgs version has been fixed.

overlays/default.nix

@@ -1,3 +1,3 @@
 {
-  sabnzbd-fix-missing-packages = import ./sabnzbd-fix-missing-dependencies;
+  # NOTE: no overlays at the moment
 }

overlays/sabnzbd-fix-missing-dependencies/default.nix

@@ -1,4 +0,0 @@
-final: prev:
-{
-  sabnzbd = final.callPackage ./sabnzbd.nix { };
-}

overlays/sabnzbd-fix-missing-dependencies/sabnzbd.nix

@@ -1,60 +0,0 @@
-{ lib
-, stdenv
-, fetchFromGitHub
-, python3
-, par2cmdline
-, unzip
-, unrar
-, p7zip
-, makeWrapper
-}:
-
-let
-  pythonEnv = python3.withPackages (ps: with ps; [
-    chardet
-    cheetah3
-    cherrypy
-    configobj
-    cryptography
-    feedparser
-    guessit
-    puremagic
-    sabyenc3
-  ]);
-  path = lib.makeBinPath [ par2cmdline unrar unzip p7zip ];
-in
-stdenv.mkDerivation rec {
-  version = "3.4.0";
-  pname = "sabnzbd";
-
-  src = fetchFromGitHub {
-    owner = pname;
-    repo = pname;
-    rev = version;
-    sha256 = "sha256-zax+PuvCmYOlEhRmiCp7UOd9VI0i8dbgTPyTtqLuGUM=";
-  };
-
-  nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ pythonEnv ];
-
-  installPhase = ''
-    runHook preInstall
-
-    mkdir -p $out
-    cp -R * $out/
-    mkdir $out/bin
-    echo "${pythonEnv}/bin/python $out/SABnzbd.py \$*" > $out/bin/sabnzbd
-    chmod +x $out/bin/sabnzbd
-    wrapProgram $out/bin/sabnzbd --set PATH ${path}
-
-    runHook postInstall
-  '';
-
-  meta = with lib; {
-    description = "Usenet NZB downloader, par2 repairer and auto extracting server";
-    homepage = "https://sabnzbd.org";
-    license = licenses.gpl2Plus;
-    platforms = platforms.linux;
-    maintainers = with lib.maintainers; [ fridh ];
-  };
-}