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.

lib/default.nix

@@ -1,12 +0,0 @@
-{
-  inputs,
-  lib,
-  pkgs,
-  ...
-}: let
-  inherit (lib) makeExtensible foldr attrValues;
-  tlater-lib = makeExtensible (self: let
-    callLibs = file: import file {inherit self lib pkgs inputs;};
-  in {minecraft = callLibs ./minecraft.nix;});
-in
-  tlater-lib.extend (self: super: foldr (a: b: a // b) {} (attrValues super))