doc: remove outdated Chrome 66 and ndb references from debugger

Remove the Chrome 66.0.3345.0 version check (Chrome 66 shipped in
2018), the claim that Chrome DevTools doesn't support debugging worker
threads (which uses time-tied language), and the recommendation to use
ndb (which has been archived since July 2023).

Fixes: #54078

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
PR-URL: #62202
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

Author: 2 people

doc/api/debugger.md

@@ -260,13 +260,5 @@ For help, see: https://nodejs.org/en/docs/inspector
 at the end of the URL is generated on the fly, it varies in different
 debugging sessions.)
 
-If the Chrome browser is older than 66.0.3345.0,
-use `inspector.html` instead of `js_app.html` in the above URL.
-
-Chrome DevTools doesn't support debugging [worker threads][] yet.
-[ndb][] can be used to debug them.
-
 [Chrome DevTools Protocol]: https://chromedevtools.github.io/devtools-protocol/
 [`debugger`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/debugger
-[ndb]: https://github.com/GoogleChromeLabs/ndb/
-[worker threads]: worker_threads.md