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:

• Remove invalid test re: listitem namefrom contents, as it does not align with the spec. interop-accessibility#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:

• ARIA should clarify distinction between “contents exposed as descendant text nodes” vs “name from contents” (Was: listitem should include name from Contents or name prohibited) w3c/aria#2160

[zcorpan]

@jcsteh can you review this test change proposal?

[cookiecrook]

@nmlapre @jcsteh @twilco @rahimabdi @scottaohara

Two PRs so far

• remove invalid namefrom contents expectations for li wpt#45867
• remove invalid namefrom contents expectations for td wpt#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.