Keeping a tidy repository is important; not just a tidy codebase, but a tidy repository in as far as not having spare branches rotting around. Generally the main repository doesn’t keep multiple branches but sometimes you need to push to a main repository simply to get Travis CI to run tests. Once a branch is merged, for example, we no longer need it around.
Deleting a branch on a local host machine repo is easy:
git branch -d <branch_name>
To remove a branch from the remote git repository, like a GitHub-hosted repository, you can execute:
git push <remote_name> --delete <branch_name>
If you learned something here, check out Delete Merged Branches with git!