chronos: remove package

This failed to build for >9 months, as mesos failed to build for >9
months.

pkgs/applications/networking/cluster/chronos/chronos-deps.nix

@@ -1,14 +0,0 @@
-{stdenv, curl}:
-
-stdenv.mkDerivation {
-  name = "chronos-maven-deps";
-  builder = ./fetch-chronos-deps.sh;
-
-  outputHashAlgo = "sha256";
-  outputHashMode = "recursive";
-  outputHash = "0mm2sb1p5zz6b0z2s4zhdlix6fafydsxmqjy8zbkwzw4f6lazzyl";
-
-  nativeBuildInputs = [ curl ];
-
-  impureEnvVars = stdenv.lib.fetchers.proxyImpureEnvVars;
-}

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

@@ -1,39 +0,0 @@
-{ stdenv, lib, makeWrapper, fetchgit, curl, jdk, maven, nodejs, mesos }:
-
-stdenv.mkDerivation rec {
-  pname = "chronos";
-  version = "286b2ccb8e4695f8e413406ceca85b60d3a87e22";
-
-  src = fetchgit {
-    url = "https://github.com/airbnb/chronos";
-    rev = version;
-    sha256 = "0hrln3ad2g2cq2xqmy5mq32cdxxb9vb6v6jp6kcq03f8km6v3g9c";
-  };
-
-  buildInputs = [ makeWrapper curl jdk maven nodejs mesos ];
-
-  mavenRepo = import ./chronos-deps.nix { inherit stdenv curl; };
-
-  buildPhase = ''
-    ln -s $mavenRepo .m2
-    mvn package -Dmaven.repo.local=$(pwd)/.m2
-  '';
-
-  installPhase = ''
-    mkdir -p $out/{bin,libexec/chronos}
-    cp target/chronos*.jar $out/libexec/chronos/${pname}-${version}.jar
-
-    makeWrapper ${jdk.jre}/bin/java $out/bin/chronos \
-      --add-flags "-Xmx384m -Xms384m -cp $out/libexec/chronos/${pname}-${version}.jar com.airbnb.scheduler.Main" \
-      --prefix "MESOS_NATIVE_LIBRARY" : "$MESOS_NATIVE_LIBRARY"
-  '';
-
-  meta = with lib; {
-    homepage    = "http://airbnb.github.io/chronos";
-    license     = licenses.asl20;
-    description = "Fault tolerant job scheduler for Mesos which handles dependencies and ISO8601 based schedules";
-    maintainers = with maintainers; [ offline ];
-    platforms   = platforms.unix;
-    broken = true; # doesn't build https://hydra.nixos.org/build/25768319
-  };
-}

pkgs/top-level/aliases.nix

@@ -71,6 +71,7 @@ mapAliases ({
   catfish = xfce.catfish; # added 2019-12-22
   cgmanager = throw "cgmanager was deprecated by lxc and therefore removed from nixpkgs."; # added 2020-06-05
   checkbashism = checkbashisms; # added 2016-08-16
+  chronos = throw "chronos has been removed from nixpkgs, as it was unmaintained"; # added 2020-08-15
   cide = throw "deprecated in 2019-09-11: abandoned by upstream";
   cinepaint = throw "cinepaint has been removed from nixpkgs, as it was unmaintained"; # added 2019-12-10
   cifs_utils = cifs-utils; # added 2016-08

pkgs/top-level/all-packages.nix

@@ -19438,8 +19438,6 @@ in
 
   chromium = callPackage ../applications/networking/browsers/chromium (config.chromium or {});
 
-  chronos = callPackage ../applications/networking/cluster/chronos { };
-
   chromiumBeta = lowPrio (chromium.override { channel = "beta"; });
 
   chromiumDev = lowPrio (chromium.override { channel = "dev"; });