dillon1000/react

Delete `__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED` from React Native Renderer (#31276)

## Summary

The React Native Renderer exports a
`__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED` property with a
single method that has no remaining call sites:
`computeComponentStackForErrorReporting`

This PR cleans up this unused export.

## How did you test this change?

```
$ yarn
$ yarn flow fabric
$ yarn test
```