Git Eliminar archivo del repositorio que se ha agregado a Gitignore
Commit any files that you need to change/delete to the repo. Then:
git rm -r --cached . # this will clean all files from cache. To clean a single file, exchange '.' with filename
git add . # add all of the now uncached files that are not gitignored to the staging area
git commit -m "fix .gitignore" # commit the changes
Envious Elk