hydrogen_0: remove

pkgs/applications/audio/hydrogen/0.nix

@@ -1,48 +0,0 @@
-{ lib
-, stdenv
-, fetchFromGitHub
-, pkg-config
-, cmake
-, alsa-lib
-, boost
-, glib
-, lash
-, libjack2
-, libarchive
-, libsndfile
-, lrdf
-, qt4
-}:
-
-stdenv.mkDerivation rec {
-  version = "0.9.7";
-  pname = "hydrogen";
-
-  src = fetchFromGitHub {
-    owner = "hydrogen-music";
-    repo = "hydrogen";
-    rev = version;
-    sha256 = "sha256-6ycNUcumtAEl/6XbIpW6JglGv4nNOdMrOJ1nvJg3z/c=";
-  };
-
-  nativeBuildInputs = [ pkg-config cmake ];
-  buildInputs = [
-    alsa-lib
-    boost
-    glib
-    lash
-    libjack2
-    libarchive
-    libsndfile
-    lrdf
-    qt4
-  ];
-
-  meta = with lib; {
-    description = "Advanced drum machine";
-    homepage = "http://www.hydrogen-music.org";
-    license = licenses.gpl2;
-    platforms = platforms.linux;
-    maintainers = [ maintainers.goibhniu ];
-  };
-}

pkgs/top-level/aliases.nix

@@ -739,6 +739,7 @@ mapAliases ({
   ht-rust = xh; # Added 2021-02-13
   hydra-flakes = throw "hydra-flakes: Flakes support has been merged into Hydra's master. Please use `hydra_unstable` now"; # Added 2020-04-06
   hydra-unstable = hydra_unstable; # added 2022-05-10
+  hydrogen_0 = throw "hydrogen_0 has been removed, because it depended on qt4"; # Added 2022-06-13
   hyperspace-cli = throw "hyperspace-cli is out of date, and has been deprecated upstream in favour of using the individual repos instead"; # Added 2022-08-29
 
   ### I ###

pkgs/top-level/all-packages.nix

@@ -32651,7 +32651,6 @@ with pkgs;
   husky = callPackage ../development/tools/misc/husky { };
 
   hydrogen = qt5.callPackage ../applications/audio/hydrogen { };
-  hydrogen_0 = callPackage ../applications/audio/hydrogen/0.nix { }; # Old stable, has GMKit.
 
   hydroxide = callPackage ../applications/networking/hydroxide { };