Auto merge of #13912 - ddrmanxbxfr:remove-deprecated-url-methods, r=Ms2ger

Remove URL.domainToASCII and URL.domainToUnicode

Modifications

- Removed URL.domainToASCII method
- Removed URL.domainToUnicode method
- Added test in wpt to make sure both method are undefined.

---
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #13835  (github issue number if applicable).
- [X] There are tests for these changes

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components/script/dom/webidls/URL.webidl

@@ -5,9 +5,6 @@
 // https://url.spec.whatwg.org/#url
 [Constructor(USVString url, optional USVString base), Exposed=(Window,Worker)]
 interface URL {
-  static USVString domainToASCII(USVString domain);
-  static USVString domainToUnicode(USVString domain);
-
   [SetterThrows]
   /*stringifier*/ attribute USVString href;
   readonly attribute USVString origin;