chore: fix JavaScript lint errors (issue #8082)

[Payal-Goswami]

Resolves #8082.

Description

This pull request:

• Fixes ESLint/style errors in benchmark.js for Issue Fix JavaScript lint errors #8082.
• Replaced explicit undefined with void 0.
• Moved all var declarations to the top of functions.
• Added comments inside empty functions where needed.
• Fixed max-statements-per-line issues.
• File now passes npx eslint --fix without errors.

Note: This PR only fixes ESLint/style issues in benchmark.js. No functional changes were made, so the behavior of the code remains unchanged. Existing tests were not run locally due to Windows Make limitations, but these changes do not affect test outcomes.

Related Issues

This pull request:

• resolves Fix JavaScript lint errors #8082

Questions

No.

Other

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
assert/is-odd	$\color{green}262/262$ $\color{green}+100.00\%$	$\color{green}18/18$ $\color{green}+100.00\%$	$\color{green}3/3$ $\color{green}+100.00\%$	$\color{green}262/262$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.

[Payal-Goswami]

@kgryte Thanks for reviewing and merging! 🙏✨