Remove some accessibility tests due to new ARIA issue re: contents exposed vs `nameFrom: contents`

[cookiecrook]

Test List

At least one type of subtest will be removed in:

• https://github.com/web-platform-tests/interop-accessibility/issues/118

But there may be more after a resolution in the following ARIA issue... li doesn't align with the spec (so that's tracked as a removeal), but p, td, etc and related roles may be affected.

Rationale

Open ARIA issue here:

• https://github.com/w3c/aria/issues/2160

[zcorpan]

@jcsteh can you review this test change proposal?

[cookiecrook]

@nmlapre @jcsteh @twilco @rahimabdi @scottaohara

Two PRs so far

• https://github.com/web-platform-tests/wpt/pull/45867
• https://github.com/web-platform-tests/wpt/pull/45870

[cookiecrook]

@zcorpan Those two PRs were reviewed and merged, by the way. I'm not sure if this tracker needs to stay open beyond that.

[jcsteh]

For the record, Mozilla approved both of these changes.