Remove warnings from naive Monte Carlo

[NAThompson]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fccad84) 85.23% compared to head (0bb7a82) 85.22%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1075      +/-   ##
===========================================
- Coverage    85.23%   85.22%   -0.02%     
===========================================
  Files          879      879              
  Lines        66899    66880      -19     
===========================================
- Hits         57022    56997      -25     
- Misses        9877     9883       +6     

Files	Coverage Δ
test/naive_monte_carlo_test.cpp	95.40% <100.00%> (+0.37%)	⬆️

... and 3 files with indirect coverage changes

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