front: cleanup op format functions in scenarios

[Synar]

Cleanup changes from #9614

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 38.17%. Comparing base (83934dc) to head (6e452a5).
Report is 9 commits behind head on dev.

Files with missing lines	Patch %	Lines
front/src/modules/pathfinding/utils.ts	0.00%	3 Missing ⚠️
...ationResult/hooks/useFormattedOperationalPoints.ts	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #9899      +/-   ##
==========================================
- Coverage   38.20%   38.17%   -0.03%     
==========================================
  Files         998      997       -1     
  Lines       92197    92191       -6     
  Branches     1192     1192              
==========================================
- Hits        35223    35198      -25     
- Misses      56518    56537      +19     
  Partials      456      456              

Flag	Coverage Δ
editoast	73.35% <ø> (-0.05%)	⬇️
front	20.15% <20.00%> (-0.01%)	⬇️
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.49% <ø> (ø)
tests	87.00% <ø> (ø)

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[emersion]

Nice!