remove all useless header comments (#3363)

see #3358

used command: `find ./ -type f -exec perl -i -0pe
's/\/\*\s*magicmirror.*?\*\/\s*//si' {} \;`

This is a first draft, I think we should preserve some of the comments.

modules/default/newsfeed/newsfeedfetcher.js

@@ -1,10 +1,3 @@
-/* MagicMirror²
- * Node Helper: Newsfeed - NewsfeedFetcher
- *
- * By Michael Teeuw https://michaelteeuw.nl
- * MIT Licensed.
- */
-
 const crypto = require("node:crypto");
 const stream = require("node:stream");
 const FeedMe = require("feedme");