From https://discuss.atom.io/t/how-to-stop-the-autocomplete-when-i-do-or/19093/7

After I disabled the package, by clicking the deactivate button in the settings view, I still got auto-closing brackets and quotes. I had to restart Atom to get the package to actually disable. I saw that main.coffee doesn't export a deactivate function, so there's a lead :)...