small refactoring

[kenkoooo]

No description provided.

[codecov-io]

Codecov Report

Merging #320 into master will decrease coverage by 0.02%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #320      +/-   ##
==========================================
- Coverage   19.33%   19.31%   -0.03%     
==========================================
  Files          71       71              
  Lines        1898     1900       +2     
  Branches      270      270              
==========================================
  Hits          367      367              
- Misses       1461     1463       +2     
  Partials       70       70

Impacted Files	Coverage Δ
...der-problems-frontend/src/pages/LanguageOwners.tsx	0% <0%> (ø)	⬆️

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