[admin] Remove previews for non-UI components that didn't add much value

[elia]

Summary

The coverage shouldn't drop after this change.

Checklist

Check out our PR guidelines for more details.

The following are mandatory for all PRs:

• I have written a thorough PR description.
• I have kept my commits small and atomic.
• I have used clear, explanatory commit messages.

The following are not always needed:

• 📖 I have updated the README to account for my changes.
• 📑 I have documented new code with YARD.
• 🛣️ I have opened a PR to update the guides.
• ✅ I have added automated tests to cover my changes.
• 📸 I have attached screenshots to demo visual changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.65%. Comparing base (64f6a58) to head (d4c83e3).
Report is 1264 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5592      +/-   ##
==========================================
- Coverage   88.66%   88.65%   -0.01%     
==========================================
  Files         683      683              
  Lines       16293    16293              
==========================================
- Hits        14446    14445       -1     
- Misses       1847     1848       +1     

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[github-actions]

💔 All backports failed

Status	Branch	Result
❌	v4.2	Backport failed because of merge conflicts
❌	v4.3	Backport failed because of merge conflicts You might need to backport the following PRs to v4.3: - Merge pull request #3379 from nebulab/kennyadsl/sprockets-4-support - Lock rack to be less than 3 - Add a DummyApp sprockets 4 configuration manifest - Merge pull request #5582 from solidusio/elia/fix-select2-locales-loading-with-precompiled-assets

Manual backport

To create the backport manually run:

backport --pr 5592

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details

[github-actions]

💔 All backports failed

Status	Branch	Result
❌	v4.2	Backport failed because of merge conflicts
❌	v4.3	Backport failed because of merge conflicts You might need to backport the following PRs to v4.3: - Merge pull request #3379 from nebulab/kennyadsl/sprockets-4-support - Lock rack to be less than 3 - Add a DummyApp sprockets 4 configuration manifest - Merge pull request #5582 from solidusio/elia/fix-select2-locales-loading-with-precompiled-assets

Manual backport

To create the backport manually run:

backport --pr 5592

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details

[tvdeyen]

💚 All backports created successfully

Status	Branch	Result
✅	v4.3

Questions ?

Please refer to the Backport tool documentation

[tvdeyen]

💚 All backports created successfully

Status	Branch	Result
✅	v4.2

Questions ?

Please refer to the Backport tool documentation