남길 이유가 딱히 없다.깃허브에 머지가 되면 자동으로 지워주는 기능이 있다.Managing the automatic deletion of branches - GitHub DocsYou can have head branches automatically deleted after pull requests are merged in your repository.https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/managing-the-automatic-deletion-of-branches
