chore: dead-code removal

[fredbi]

• removed dead-code (added justification comments)
• added unit tests (now using mocks)
• removed misleading comments or "TODO" mentions that will never get done

Change type

Please select: 🆕 New feature or enhancement|🔧 Bug fix'|📃 Documentation update

Short description

Fixes

Full description

Checklist

• I have signed all my commits with my name and email (see DCO. This does not require a PGP-signed commit
• I have rebased and squashed my work, so only one commit remains
• I have added tests to cover my changes.
• I have properly enriched go doc comments in code.
• I have properly documented any breaking change.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.19%. Comparing base (7262605) to head (429f2c6).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
internal/builders/schema/schema.go	36.36%	7 Missing ⚠️
internal/builders/items/typable.go	0.00%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (50.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #17       +/-   ##
===========================================
+ Coverage   71.79%   87.19%   +15.39%     
===========================================
  Files          48       43        -5     
  Lines        4878     3958      -920     
===========================================
- Hits         3502     3451       -51     
+ Misses       1148      314      -834     
+ Partials      228      193       -35     

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