Remove MutationObserverInit dictionary from MDN

[queengooborg]

This PR removes the MutationObserverInit dictionary from MDN. Corresponds with its removal in BCD, see mdn/browser-compat-data#12795.

[github-actions]

Preview URLs

• https://pr9737.content.dev.mdn.mozit.cloud/en-US/docs/Mozilla/Firefox/Releases/61
• https://pr9737.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/MutationObserver/observe
• https://pr9737.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/MutationRecord

Flaws

Note! 2 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/API/MutationRecord
Title: MutationRecord
on GitHub
Flaw count: 20

• macros:
  • /en-US/docs/Web/API/MutationRecord/type does not exist
  • /en-US/docs/Web/API/MutationRecord/target does not exist
  • /en-US/docs/Web/API/MutationRecord/type does not exist
  • /en-US/docs/Web/API/MutationRecord/addedNodes does not exist
  • /en-US/docs/Web/API/MutationRecord/removedNodes does not exist
  • and 6 more flaws omitted
• bad_bcd_links:
  • no explanation!
  • no explanation!
  • no explanation!
  • no explanation!
  • no explanation!
  • and 4 more flaws omitted

External URLs

URL: /en-US/docs/Web/API/MutationObserver/observe
Title: MutationObserver.observe()
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/MutationRecord
Title: MutationRecord
on GitHub

No new external URLs

---

URL: /en-US/docs/Mozilla/Firefox/Releases/61
Title: Firefox 61 for developers
on GitHub

No new external URLs

(this comment was updated 2021-10-11 22:37:29.949473)

[hamishwillee]

@queengooborg Looks good as far as it goes. Are any of the examples in the remove attributes also worth copying into retained documents?

[queengooborg]

I didn't think the examples were all too important to copy over, but it might be helpful to include the example from attributeFilter! I'll make the change now.

[hamishwillee]

Yes, I think that is good. Thanks very much.