treewide: Remove minecraft server

This has fallen into disuse since the big Java vulnerability, and I
have ideas for better ways of doing this. Meanwhile it's making
maintenance and refactoring more difficult.

Hence I'll remove the server completely for the time being.

configuration/services/minecraft.nix

@@ -1,141 +0,0 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}: let
-  minecraft-server-args = [
-    "-Xms2G"
-    "-Xmx2G"
-    "-Dsun.rmi.dgc.server.gcInterval=2157583646"
-    "-XX:+UseG1GC"
-    "-XX:+ParallelRefProcEnabled"
-    "-XX:MaxGCPauseMillis=200"
-    "-XX:+UnlockExperimentalVMOptions"
-    "-XX:+DisableExplicitGC"
-    "-XX:+AlwaysPreTouch"
-    "-XX:G1NewSizePercent=30"
-    "-XX:G1MaxNewSizePercent=40"
-    "-XX:G1HeapRegionSize=8M"
-    "-XX:G1ReservePercent=20"
-    "-XX:G1HeapWastePercent=5"
-    "-XX:G1MixedGCCountTarget=4"
-    "-XX:InitiatingHeapOccupancyPercent=15"
-    "-XX:G1MixedGCLiveThresholdPercent=90"
-    "-XX:G1RSetUpdatingPauseTimePercent=5"
-    "-XX:SurvivorRatio=32"
-    "-XX:+PerfDisableSharedMem"
-    "-XX:MaxTenuringThreshold=1"
-  ];
-  ops = pkgs.writeText "ops.json" (builtins.toJSON [
-    {
-      uuid = "140d177a-966f-41b8-a4c0-e305babd291b";
-      name = "TLATER";
-      level = 4;
-      bypassesPlayerLimit = true;
-    }
-  ]);
-  whitelist = pkgs.writeText "whitelist.json" (builtins.toJSON [
-    {
-      uuid = "59cd1648-14a4-4bcf-8f5a-2e1bde678f2c";
-      name = "romino25";
-    }
-    {
-      uuid = "0ab6e3d1-544a-47e7-8538-2e6c248e49a4";
-      name = "lasi25";
-    }
-    {
-      uuid = "01c9e737-fc9d-4d55-b8c2-610ca80eb4be";
-      name = "Nampeyo25";
-    }
-    {
-      uuid = "140d177a-966f-41b8-a4c0-e305babd291b";
-      name = "tlater";
-    }
-  ]);
-  eula = pkgs.writeText "eula.txt" "eula=true";
-in {
-  users = {
-    extraUsers.minecraft = {
-      uid = config.ids.uids.minecraft;
-      group = config.users.extraGroups.minecraft.name;
-      isSystemUser = true;
-      description = "Minecraft server user";
-    };
-    extraGroups.minecraft = {gid = config.ids.gids.minecraft;};
-  };
-
-  virtualisation.oci-containers.containers.minecraft-voor-kia = let
-    properties = ./configs/minecraft/voor-kia/server.properties;
-    icon = ./configs/minecraft/voor-kia/server-icon.png;
-  in {
-    image = "tlaternet/minecraft-voor-kia";
-
-    imageFile = pkgs.dockerTools.buildImage {
-      name = "tlaternet/minecraft-voor-kia";
-      tag = "latest";
-      contents = [
-        (pkgs.local.forge-server.override {
-          jre_headless = pkgs.jdk11_headless;
-          mods = pkgs.local.voor-kia;
-          modConfig = ./configs/minecraft/voor-kia/config;
-          defaultconfigs = ./configs/minecraft/voor-kia/defaultconfigs;
-        })
-      ];
-
-      config = let
-        uid = toString config.users.extraUsers.minecraft.uid;
-        gid = toString config.users.extraGroups.minecraft.gid;
-      in {
-        Cmd = ["forge-server"] ++ minecraft-server-args;
-        WorkingDir = "/var/lib/minecraft";
-        Volumes = {
-          "/var/lib/minecraft" = {};
-          # Required because some things will try to write to /tmp,
-          # which doesn't exist if it's not defined as a volume.
-          "/tmp" = {};
-        };
-        ExposedPorts = {"25565" = {};};
-        User = "${uid}:${gid}";
-      };
-    };
-
-    extraOptions = ["--cpus=1.0"];
-    autoStart = false;
-    ports = ["25565:25565"];
-    volumes = [
-      "minecraft:/var/lib/minecraft"
-      "${eula}:/var/lib/minecraft/eula.txt:ro"
-      "${icon}:/var/lib/minecraft/server-icon.png:ro"
-      "${ops}:/var/lib/minecraft/ops.json:ro"
-      "${properties}:/var/lib/minecraft/server.properties:ro"
-      "${whitelist}:/var/lib/minecraft/whitelist.json:ro"
-    ];
-  };
-
-  systemd.timers.podman-minecraft-voor-kia-off = {
-    description = "Turns off the minecraft server every day at 4 am";
-    wantedBy = ["podman-minecraft-voor-kia.service"];
-    timerConfig = {
-      Unit = "podman-minecraft-voor-kia-starter@stop.service";
-      OnCalendar = "04:00:00";
-    };
-  };
-
-  systemd.timers.podman-minecraft-voor-kia-on = {
-    description = "Turns on the minecraft server every day at 2 pm";
-    wantedBy = ["podman-minecraft-voor-kia.service"];
-    timerConfig = {
-      Unit = "podman-minecraft-voor-kia-starter@start.service";
-      OnCalendar = "14:00:00";
-    };
-  };
-
-  systemd.services."podman-minecraft-voor-kia-starter@" = {
-    description = "Unit to stop/start the minecraft server";
-    serviceConfig = {
-      ExecStart = "${pkgs.systemd}/bin/systemctl %i podman-minecraft-voor-kia.service";
-      Type = "oneshot";
-    };
-  };
-}