Drop “display: none” from details element contents styling

[sideshowbarker]

What are you trying to accomplish?

Fixes #2592

What approach did you choose and why?

Removed display: none from details contents styling

What should reviewers focus on?

See #2592 (comment) for repro/test steps

Can these changes ship as is?

• Yes, this PR does not depend on additional changes. 🚢

[changeset-bot]

🦋 Changeset detected

Latest commit: 887edd8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/css	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[keithamus]

This was likely around for IE11 which we've long since dropped support for. Originally added in #371 in 2017.

As far as I can tell all browsers we see traffic GitHub support <details> and therefore don't need this. So 👍 from me.

[github-actions]

Hi! This pull request has been marked as stale because it has been open with no activity for 60 days. You can comment on the pull request or remove the stale label to keep it open. If you do nothing, this pull request will be closed in 7 days.

[sideshowbarker]

Friendly ping to reviewers

[keithamus]

Thanks for the ping @sideshowbarker. I’ll look at integrating this tomorrow and if it works out nicely we can look to ship it this week.