feature(upgrade): Remove empty react-native.config.js

[tocalvo]

Hi!
The file looks empty but give and error when i try to upgrade to react-native 0.69.3 due to the change on the cli and the deprecated fields hooks and assets.

The react-native-cli update: https://github.com/react-native-community/cli/releases/tag/v8.0.0
and this is the change : react-native-community/cli#1537

I was searching about the reason to add the file with empty values looking in the old cli doc:
https://github.com/react-native-community/cli/blob/6615eb30f37bec5bb25acc066c849c4aa2d8a4cd/docs/dependencies.md

But can see any clue about. The fields are empty so seems that can be deleted the whole file.

I try this with my own app. it works, compile without errors and still work the fingerprint scan.

Fixes #243

[mikehardy]

someone just logged an issue about the same thing, I don't have the time to do a release (I'm not really a maintainer here...) but this will at least make a git reference to current code work, thanks!