[dom] Some Conformance section stuff is duplicated (#19)

It looks like some of it is boilerplate from Bikeshed and some of it is from the original.

https://github.com/whatwg/dom/commit/b105abe2fed72000764523b69b97bed57f47815d shows it being added; I'd guess something different between how @tabatkins and @annevk ran Bikeshed

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/dom/issues/19