• commit & push everything
• remove hooks: git lfs uninstall
• remove lfs stuff from .gitattributes
• list lfs files using git lfs ls-files | sed -r 's/^.{13}//' > files.txt into a “files.txt”.
• run git rm --cached for each file: while read line; do git rm --cached "$line"; done < files.txt
• run git add for each file while read line; do git add "$line"; done < files.txt
• commit everything

    git add .gitattributes
    git commit -m "unlfs"
    git push origin
  

• check that no lfs files left

   git lfs ls-files
   remove junk
   rm -rf .git/lfs