SHELL

git update gitignore remove files

git rm --cached `git ls-files -i -c --exclude-from=.gitignore`

remove gitignore files

git ls-files --ignored --exclude-standard -z | xargs -0 git rm --cached
git commit -am "Remove ignored files"


// answer from: thSoft

delete gitignore files

git rm -r --cached . 
git add .
git commit -am "Drop ignored files"