hexen: remove abandoned software

pkgs/games/hexen/default.nix

@@ -1,18 +0,0 @@
-{stdenv, fetchurl, SDL} :
-
-stdenv.mkDerivation {
-  name = "hexen-0.2.3";
-  src = fetchurl {
-    url = https://www.libsdl.org/projects/hexen/src/hexen-0.2.3.tar.gz;
-    sha256 = "c1433e930f2003c5f817f935406bb28ba15298a15b1c11f83f42df3e9f1f3bc4";
-  };
-
-  buildInputs = [ SDL ];
-
-  meta = {
-    homepage = http://www.libsdl.org/projects/hexen/;
-    description = "Port of Raven Software's popular Hexen 3-D shooter game";
-    license = stdenv.lib.licenses.free;
-    broken = true;
-  };
-}

pkgs/top-level/aliases.nix

@@ -165,6 +165,7 @@ mapAliases ({
   gutenberg = zola;  # added 2018-11-17
   heimdalFull = heimdal; # added 2018-05-01
   hepmc = hepmc2; # added 2019-08-05
+  hexen = throw "hexen (SDL port) has been removed: Abandoned by upstream."; # added 2019-12-11
   hicolor_icon_theme = hicolor-icon-theme; # added 2018-02-25
   htmlTidy = html-tidy;  # added 2014-12-06
   iana_etc = iana-etc;  # added 2017-03-08

pkgs/top-level/all-packages.nix

@@ -22825,8 +22825,6 @@ in
     inherit (haskellPackages) ghcWithPackages;
   };
 
-  hexen = callPackage ../games/hexen { };
-
   holdingnuts = callPackage ../games/holdingnuts { };
 
   hyperrogue = callPackage ../games/hyperrogue { };