deleting git branch on github does not remove git branch on local machine code example

Example 1: delete branch from remote

// delete branch locally
git branch -d localBranchName

//delete local branch that is unmerged
git branch -D localBranchName

// delete branch remotely
git push origin --delete remoteBranchName

Example 2: How to Delete Local/Remote Git Branches

$ git branch -r | egrep -v -f /dev/fd/0  <(git branch -vv | grep origin) | xargs git branch -d