marathon: remove package

This failed to build for >9 months.

pkgs/applications/networking/cluster/marathon/default.nix

@@ -1,30 +0,0 @@
-{ stdenv, makeWrapper, jdk, mesos, fetchurl }:
-
-stdenv.mkDerivation rec {
-  pname = "marathon";
-  version = "1.4.2";
-
-  src = fetchurl {
-    url = "https://downloads.mesosphere.com/marathon/v${version}/marathon-${version}.tgz";
-    sha256 = "6eab65a95c87a989e922aca2b49ba872b50a94e46a8fd4831d1ab41f319d6932";
-  };
-
-  buildInputs = [ makeWrapper jdk mesos ];
-
-  installPhase = ''
-    mkdir -p $out/{bin,libexec/marathon}
-    cp target/scala-*/marathon*.jar $out/libexec/marathon/${pname}-${version}.jar
-
-    makeWrapper ${jdk.jre}/bin/java $out/bin/marathon \
-      --add-flags "-Xmx512m -jar $out/libexec/marathon/${pname}-${version}.jar" \
-      --set "MESOS_NATIVE_JAVA_LIBRARY" "$MESOS_NATIVE_JAVA_LIBRARY"
-    '';
-
-  meta = with stdenv.lib; {
-    homepage = "https://mesosphere.github.io/marathon";
-    description = "Cluster-wide init and control system for services in cgroups or Docker containers";
-    license = licenses.asl20;
-    maintainers = with maintainers; [ kamilchm pradeepchhetri ];
-    platforms = platforms.linux;
-  };
-}

pkgs/top-level/aliases.nix

@@ -282,6 +282,7 @@ mapAliases ({
   m3d-linux = m33-linux; # added 2016-08-13
   man_db = man-db; # added 2016-05
   manpages = man-pages; # added 2015-12-06
+  marathon = throw "marathon has been removed from nixpkgs, as it's unmaintained"; # added 2020-08-15
   mariadb-client = hiPrio mariadb.client; #added 2019.07.28
   matcha = throw "matcha was renamed to matcha-gtk-theme"; # added 2020-05-09
   matrique = spectral; # added 2020-01-27

pkgs/top-level/all-packages.nix

@@ -21283,7 +21283,6 @@ in
 
   mapmap = libsForQt5.callPackage ../applications/video/mapmap { };
 
-  marathon = callPackage ../applications/networking/cluster/marathon { };
   marathonctl = callPackage ../tools/virtualization/marathonctl { } ;
 
   markdown-pp = callPackage ../tools/text/markdown-pp { };