chore(test): suppress no-unused-vars "'x' is assigned a value but only used as type"

[exoego]

👇 Suppresses noisy false-positives on pull requests.

[!note] Unfortunately, there is no option to allow type-only usage and only available fix is to disable.

The author should do the following, if applicable

• [ ] Add tests
• [ ] Run tests
• [ ] bun run format:fix && bun run lint:fix to format the code
• [ ] Add TSDoc/JSDoc to document the code

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.58%. Comparing base (f87c221) to head (d9dd323). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3451 +/- ## ======================================= Coverage 95.58% 95.58% ======================================= Files 155 155 Lines 9357 9357 Branches 2779 2771 -8 ======================================= Hits 8944 8944 Misses 413 413 ```

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[yusukebe]

@exoego Thanks! Merging.