refactor: delete unused test-utils Importer

[adamalston]

No issue.

Deleted the unused test-utils Importer.

Changelog

Removed

• Deleted the unused test-utils Importer.

Testing / Reviewing

I saw that the module did not have any test coverage. When I looked into adding tests, I found that the file was not used anywhere, so I deleted it. If anyone thinks it should be kept, let me know and I can look into adding tests for it.

PR Checklist

As the author of this PR, before marking ready for review, confirm you:

• Reviewed every line of the diff
• Updated documentation and storybook examples
• Wrote passing tests that cover this change
• Addressed any impact on accessibility (a11y)
• Tested for cross-browser consistency
• Validated that this code is ready for review and status checks should pass

More details can be found in the pull request guide

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.85%. Comparing base (b4297c5) to head (f5de812).
⚠️ Report is 30 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21830      +/-   ##
==========================================
+ Coverage   87.75%   94.85%   +7.09%     
==========================================
  Files         536      536              
  Lines       43637    45084    +1447     
  Branches     6725     7948    +1223     
==========================================
+ Hits        38293    42763    +4470     
+ Misses       5193     2181    -3012     
+ Partials      151      140      -11     

Flag	Coverage Δ
main-packages	87.93% <ø> (-0.02%)	⬇️
web-components	98.28% <ø> (+10.68%)	⬆️

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[adamalston]

I don't plan to mark this pull request as ready for review until some of my earlier pull requests have been reviewed. I want to avoid diverting attention from them. Otherwise, these changes are ready to go.

[heloiselui]

LGTM!