revert: Adds group role and aria label to flash focus (#3263)

[orangevolon]

This reverts commit c6ed14c.

Description

Related links, issue #, if available: n/a

How has this been tested?

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.42%. Comparing base (d6733f7) to head (5509dfe).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3302      +/-   ##
==========================================
- Coverage   96.42%   96.42%   -0.01%     
==========================================
  Files         791      791              
  Lines       22605    22603       -2     
  Branches     7814     7806       -8     
==========================================
- Hits        21797    21795       -2     
  Misses        754      754              
  Partials       54       54              

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