style: simplify code

[LinLin00000000]

Checklist

• [x] I have ensured my pull request is not behind the main or master branch of the original repository.
• [x] I have rebased all commits where necessary so that reviewing this pull request can be done without having to merge it first.
• [x] I have written a commit message that passes commitlint linting.
• [x] I have ensured that my code changes pass linting tests.
• [x] I have ensured that my code changes pass unit tests.
• [x] I have described my pull request and the reasons for code changes along with context if necessary.

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (bff06e9) 100.00% compared to head (8633b8a) 100.00%.

:exclamation: Current head 8633b8a differs from pull request most recent head 388d8c2. Consider uploading reports for the commit 388d8c2 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #171   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           17        16    -1     
  Branches         5         5           
=========================================
- Hits            17        16    -1     

Impacted Files	Coverage Δ
index.js	100.00% <100.00%> (ø)

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