The git-filter method of removing a file completely from git history. Remember to `git push --force` if the repo has a remote!

git-obliterate

#!/usr/bin/env bash                                                                                                                

FILEPATH=$@                                                                                                                        
   
git filter-branch --force --index-filter "git rm --cached --ignore-unmatch $FILEPATH" --prune-empty --tag-name-filter cat -- --all