fix: eslint scope analyzer error

[amareshsm]

Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request?

I cleaned up dependencies by removing those not used in the repository. While doing this I assumed assert is not getting used and removed it. Then the scope view broke and got to know assert is getting used by eslint-scope package.

https://github.com/eslint/js/blob/79c6e93ba93b46186ebfac111c94f44ab3b4ee27/packages/eslint-scope/lib/scope-manager.js#L187

What changes did you make? (Give an overview)

Added assert package

Related Issues

Is there anything you'd like reviewers to focus on?

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[nzakas]

I'd rather fix this: eslint/js#625

[amareshsm]

Since we have decided to completely remove references to assert, as discussed here, this PR is no longer necessary.

[amareshsm]

Closing this PR in favour of eslint/js#626