remove unnecessary factory function wrappers

[jamescripter]

Description

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature / enhancement (non-breaking change which adds functionality)
• Security fix
• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Add changelog entry following the contributing guide
• Documentation has been updated
• This change requires changes in testing:
  • unit tests
  • E2E tests

[codecov]

Codecov Report

❌ Patch coverage is 73.33333% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.68%. Comparing base (47215db) to head (63bcb37).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ksm/metric/metric.go	73.33%	4 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1429      +/-   ##
==========================================
- Coverage   74.70%   74.68%   -0.02%     
==========================================
  Files          53       53              
  Lines        3688     3686       -2     
==========================================
- Hits         2755     2753       -2     
  Misses        762      762              
  Partials      171      171              

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