test: drop most unit tests

[thomasrockhu-codecov]

Removes most unit tests so project coverage falls.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.47%. Comparing base (3a8e7ae) to head (c2f75c6).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #353      +/-   ##
==========================================
- Coverage   97.61%   89.47%   -8.15%     
==========================================
  Files           5        4       -1     
  Lines          42       19      -23     
==========================================
- Hits           41       17      -24     
- Misses          1        2       +1     

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[thomasrockhu-codecov]

Harness Code Coverage report

✅ Patch coverage is 100.00%.
❌ Project coverage is 61.11%. Comparing base (3a8e7ae) to head (c2f75c6).

Additional details and impacted files

@@          Coverage       Diff          @@
##              main       #353      +/- ##
===========================================
- Coverage    97.56%     61.11%  -36.45%   
===========================================
  Files            4          3       -1   
  Lines           41         18      -23   
===========================================
+ Hits            40         11      -29   
- Misses           1          7       +6   
  Partials         0          0