fix(web-worker): ensure removeEventListener is bound to worker

[joelgallant]

Description

In jsdom + vitest web-workers, I get issues when calling removeEventListener from self.

'removeEventListener' called on an object that is not a valid instance of EventTarget

I tracked this down to the inserted context that web-worker inserts. This PR fixes it.

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[AriPerkkio]

Thanks, good catch! 💯