ddns-afraid (afraid.org): remove

it's unused for a year

hosts/by-name/servo/services/ddns-afraid.nix

@@ -1,27 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-# using manual ddns now
-lib.mkIf false
-{
-  systemd.services.ddns-afraid = {
-    description = "update dynamic DNS entries for freedns.afraid.org";
-    serviceConfig = {
-      EnvironmentFile = config.sops.secrets."ddns_afraid.env".path;
-      # TODO: ProtectSystem = "strict";
-      # TODO: ProtectHome = "full";
-      # TODO: PrivateTmp = true;
-    };
-    script = let
-      curl = "${pkgs.curl}/bin/curl -4";
-    in ''
-      ${curl} "https://freedns.afraid.org/dynamic/update.php?$AFRAID_KEY"
-    '';
-  };
-  systemd.timers.ddns-afraid = {
-    wantedBy = [ "multi-user.target" ];
-    timerConfig = {
-      OnStartupSec = "2min";
-      OnUnitActiveSec = "10min";
-    };
-  };
-}

hosts/by-name/servo/services/default.nix

@@ -4,7 +4,6 @@
     ./calibre.nix
     ./coturn.nix
     ./cryptocurrencies
-    ./ddns-afraid.nix
     ./ddns-he.nix
     ./email
     ./ejabberd.nix