rippled{,-validator-keys-tool}: drop

This package was broken from May until November’s ZHF due to a Git
security change. In itself, that’s a one‐line fix, but a greater
concern is that this package hasn’t been updated since 2022; there
have been many releases since, including backward‐incompatible
protocol changes:

> If you operate an XRP Ledger server, upgrade to version 1.10.0 by
> March 21 to ensure service continuity.

Since it is after March 2023 and nobody has reported this package
broken, I conclude that nobody uses it, and we should remove it until
an interested maintainer comes along.

pkgs/top-level/aliases.nix

@@ -1076,6 +1076,8 @@ mapAliases {
   retroshare06 = retroshare;
   rigsofrods = rigsofrods-bin; # Added 2023-03-22
   ring-daemon = throw "'ring-daemon' has been renamed to/replaced by 'jami-daemon'"; # Converted to throw 2024-10-17
+  rippled = throw "rippled has been removed as it was broken and had not been updated since 2022"; # Added 2024-11-25
+  rippled-validator-keys-tool = throw "rippled-validator-keys-tool has been removed as it was broken and had not been updated since 2022"; # Added 2024-11-25
   rockbox_utility = rockbox-utility; # Added 2022-03-17
   rpiboot-unstable = throw "'rpiboot-unstable' has been renamed to/replaced by 'rpiboot'"; # Converted to throw 2024-10-17
   rr-unstable = rr; # Added 2022-09-17

pkgs/top-level/all-packages.nix

@@ -12190,12 +12190,6 @@ with pkgs;
     protobuf = protobuf_21;
   };
 
-  rippled = callPackage ../servers/rippled {
-    boost = boost177;
-  };
-
-  rippled-validator-keys-tool = callPackage ../servers/rippled/validator-keys-tool.nix { };
-
   rustic = callPackage ../by-name/ru/rustic/package.nix {
     inherit (darwin.apple_sdk.frameworks) Security SystemConfiguration;
   };