Onboarding: Clean up unused MC settings data

[kt-12]

Changes proposed in this Pull Request:

Closes #2572 .

Setting up free listings during onboarding (step 2) or editing free listings after onboarding still work as expected (no regressions)

Screenshots:

Detailed test instructions:

1. Setting up free listings during onboarding (step 2) or editing free listings after onboarding still work as expected

Additional details:

Changelog entry

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.8%. Comparing base (c5c547a) to head (504167a).
Report is 177 commits behind head on feature/2458-streamline-onboarding.

Additional details and impacted files

@@                           Coverage Diff                           @@
##             feature/2458-streamline-onboarding   #2584      +/-   ##
=======================================================================
- Coverage                                  65.2%   63.8%    -1.4%     
=======================================================================
  Files                                       800     325     -475     
  Lines                                     22899    5083   -17816     
  Branches                                   1230    1231       +1     
=======================================================================
- Hits                                      14928    3241   -11687     
+ Misses                                     7803    1674    -6129     
  Partials                                    168     168              

Flag	Coverage Δ
js-unit-tests	63.8% <100.0%> (-0.1%)	⬇️
php-unit-tests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...ponents/free-listings/setup-free-listings/index.js	6.8% <100.0%> (ø)
js/src/data/actions.js	7.9% <ø> (ø)

... and 488 files with indirect coverage changes

[joemcgill]

This looks right to me. I tested this by editing the free listings from the dashboard after completing onboarding and everything seems to be working still, as expected.

@ankitguptaindia can you confirm?

[ankitguptaindia]

QA/Test Report- ✅

Testing Environment -

• WordPress: 6.6.1
• Theme active on store: Twenty Twenty-Four Version: 1.2
• WooCommerce - Version 9.2.3
• PHP: 8.3
• Web Server: Nginx
• Browser: Chrome - Version 127
• OS: macOS Sonoma 14.6.1

Test Results -

• Onboarding flow works as expected. ✅
• Free Listing works as expected and functions properly. ✅
• Free listing updates/edits work as expected. ✅
• No fatal/console errors occurred while performing the above tests. ✅

Functional Demo / Screencast -.

Recording.817.mp4

[eason9487]

The same cleanup in #2532 has been made and merged into the feature/2458-streamline-onboarding branch. Ref: d78738a

I also tested the merge of this PR locally and it resulted in an empty commit.

git checkout feature/2458-streamline-onboarding
git merge origin/feature/remove-redundant-settings
git diff HEAD~1 HEAD

This PR can be closed.

[kt-12]

Closing this as it's already handled in #2532

Check comment #2584 (review)