actually utils is unused, so remove it

[eacharles]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (678bdd0) 97.13% compared to head (60456a3) 97.13%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #62      +/-   ##
==========================================
- Coverage   97.13%   97.13%   -0.01%     
==========================================
  Files          32       32              
  Lines        1676     1675       -1     
==========================================
- Hits         1628     1627       -1     
  Misses         48       48              

Files	Coverage Δ
src/rail/evaluation/evaluator.py	100.00% <ø> (ø)
src/rail/evaluation/metrics/cdeloss.py	100.00% <100.00%> (ø)
src/rail/evaluation/stats_groups.py	100.00% <ø> (ø)

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[sschmidt23]

looks good, all tests passing now