Why does react-native-mlkit-document-scanner requires react-native-mlkit-core

[filipef101]

For all I can tell that dependency is not needed

[trevor-coleman]

I think it's mostly that it was created using one of the other modules as a template. That said it does import an error type from core -- but I don't see it as particularly important.

Would welcome a PR if you wanted to get rid of it.