SHELL

git remove folder remotely

git rm -r --cached <folder>
git commit -m "Removed Folder"
git push origin master

remove folders from remote git

git rm -r --cached myFolder

remove folders from remote 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)