untrack folder git code example
Example 1: remove a folder from git tracking
git rm -r --cached path_to_your_folder/
Example 2: github untrack files
git rm -r --cached .
Example 3: remove gitignore files
git ls-files --ignored --exclude-standard -z | xargs -0 git rm --cached
git commit -am "Remove ignored files"
// answer from: thSoft