rm -rf .git
git rm -r --cached myFolder
git rm -r test_dir
git rm -r Name_of_the_directory_you_want_to_delete
For root folder -> git rm -r myFolder
For sub folder -> git rm -r publicmyFolder
git commit -m 'myFolder is deleted'
git push
rm -r yourfolder/.git/
git rm -r one-of-the-directories // This deletes from filesystem
git commit . -m "Remove duplicated directory"
git push origin <your-git-branch> (typically 'master', but not always)
// On Mac
$ rm -rf .git