Remove duplicate implementation of Collatz sequence (#8836)

* updating DIRECTORY.md

* Remove duplicate implementation of Collatz sequence

* updating DIRECTORY.md

* Add suggestions from PR review

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Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

Tianyi Zheng committed 2y ago

69f20033e55ae62c337e2fb2146aea5fabf3e5a0

Parent: 62dcbea

Committed by GitHub <[email protected]> on 6/26/2023, 9:15:31 AM