• Delete the relevant section from the .gitmodules file.
  • Stage the .gitmodules changes git add .gitmodules
  • Delete the relevant section from .git/config.
  • Run git rm --cached ./path/to/submodule (no trailing slash).
  • Run rm -rf .git/modules/path/to/submodule.
  • Commit git commit -m "Removed submodule SUBMODULE_NAME"
  • Delete the now untracked submodule files: rm -rf ./path/to/submodule