Replace eslint-plugin-unused-imports with ts/no-unused-vars

[hyoban]

Clear and concise description of the problem

TypeScript ESLint's no-unused-vars rule now has an auto-fix.

typescript-eslint/typescript-eslint#11922

Suggested solution

At least ts/no-unused-vars can be used in the TypeScript config.

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[antfu]

But this feature is coupled with the ts plugin and would not work when user disable ts

[hyoban]

Yes, it's unclear whether this will be merged into ESLint.

typescript-eslint/typescript-eslint#11223 (comment)