Remove fs-extra and klaw (#882)

These packages are obsoleted by the promises API to the built-in Node fs
module.  The fs-extra package is also causing problems with broken APIs
that don't behave the same as Node's fs module, and throwing errors
without code properties on them.

test/controller/HttpCloser.js

@@ -1,6 +1,6 @@
 "use strict";
 const assert = require("assert").strict;
-const fs = require("fs-extra");
+const fs = require("node:fs/promises");
 const http = require("http");
 const https = require("https");
 const util = require("util");