Remove deprecated Libraries/ReactPrivate forwarding modules

[huntie]

Summary:

Note

Requires landing after next React sync into React Native. Exported as a future reference.

Cleanup: The react-private-interface entry point (D111231527) now provides the private contract between React and React Native that Libraries/ReactPrivate/ (deprecated) forwarded to. We can now delete.

Changes

• Delete Libraries/ReactPrivate/ — ReactNativePrivateInterface.js, ReactNativePrivateInitializeCore.js, and their .flow/README files.
• Update internal module references to point to source modules.
• Update xplat/js references to use new private entry point.

Changelog: [Internal]

Differential Revision: D114055938

[meta-codesync]

@huntie has exported this pull request. If you are a Meta employee, you can view the originating Diff in D114055938.

[meta-cla]

Hi @huntie!

Thank you for your pull request.

We require contributors to sign our Contributor License Agreement, and yours needs attention.

You currently have a record in our system, but the CLA is no longer valid, and will need to be resubmitted.

Process

In order for us to review and merge your suggested changes, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

Once the CLA is signed, our tooling will perform checks and validations. Afterwards, the pull request will be tagged with CLA signed. The tagging process may take up to 1 hour after signing. Please give it that time before contacting us about it.

If you have received this in error or have any questions, please contact us at cla@meta.com. Thanks!

[huntie]

(Replaced by #58452)