metal: remove package

pkgs/development/libraries/metal/default.nix

@@ -1,23 +0,0 @@
-{ lib, stdenv, fetchFromGitHub, cmake }:
-stdenv.mkDerivation rec {
-  pname = "metal";
-  version = "2.1.2";
-
-  src = fetchFromGitHub {
-    owner = "brunocodutra";
-    repo = "metal";
-    rev = "v${version}";
-    sha256 = "sha256-1I+EZtIz/2y4+dJGBONhTlUQGHgRdvXc1ZAOC9pmStw=";
-  };
-
-  nativeBuildInputs = [ cmake ];
-
-  meta = with lib; {
-    description = "Single-header C++11 library designed to make you love template metaprogramming";
-    homepage = "https://github.com/brunocodutra/metal";
-    license = licenses.mit;
-    maintainers = with maintainers; [ pmiddend ];
-    platforms = platforms.all;
-  };
-
-}

pkgs/top-level/aliases.nix

@@ -861,6 +861,7 @@ mapAliases ({
   mercurial_4 = throw "mercurial_4 has been removed as it's unmaintained"; # Added 2021-10-18
   mesos = throw "mesos has been removed from nixpkgs, as it's unmaintained"; # Added 2020-08-15
   mess = mame; # Added 2019-10-30
+  metal = throw "metal has been removed due to lack of maintainers";
   mididings = throw "mididings has been removed from nixpkgs as it doesn't support recent python3 versions and its upstream stopped maintaining it"; # Added 2022-01-12
   midoriWrapper = throw "'midoriWrapper' has been renamed to/replaced by 'midori'"; # Converted to throw 2022-02-22
   mime-types = mailcap; # Added 2022-01-21

pkgs/top-level/all-packages.nix

@@ -14175,7 +14175,6 @@ with pkgs;
     coursier = coursier.override { jre = jdk8; };
   };
 
-  metal = callPackage ../development/libraries/metal { };
   metals = callPackage ../development/tools/metals { };
   scalafix = callPackage ../development/tools/scalafix {
     jre = jre8; # TODO: remove override https://github.com/NixOS/nixpkgs/pull/89731