fix: remove unnecessary parameters in USVString calls

[Uzlopak]

USVString only expects a value parameter.

[KhafraDev]

I think errors coming from toUSVString should match the rest of the webidl impl. Can toWellFormed throw?

[Uzlopak]

I dont think that toWellFormed can throw. Its basically a put any garbage in and get a valid/well formed string back.

Wdyt?

[KhafraDev]

It technically can throw, but not in any way undici is using it.

String.prototype.toWellFormed.call(Symbol() / null / undefined)