Remove deprecated Libraries/ReactPrivate forwarding modules (#58452)

Summary:
Pull Request resolved: #58452

**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]

Reviewed By: cortinico

Differential Revision: D114055938

Author: rubennorte

packages/eslint-plugin-react-native/utils.js

@@ -519,10 +519,6 @@ const publicAPIMapping = {
     default: null,
     types: ['ErrorUtils'],
   },
-  'Libraries/ReactPrivate/ReactNativePrivateInterface': {
-    default: null,
-    types: ['PublicRootInstance', 'PublicTextInstance'],
-  },
 };
 
 module.exports = {

packages/react-native/Libraries/Animated/nodes/AnimatedProps.js

@@ -16,8 +16,8 @@ import type {AnimatedStyleAllowlist} from './AnimatedStyle';
 import NativeAnimatedHelper from '../../../src/private/animated/NativeAnimatedHelper';
 import * as ReactNativeFeatureFlags from '../../../src/private/featureflags/ReactNativeFeatureFlags';
 import {getFabricUIManager} from '../../ReactNative/FabricUIManager';
+import {getNodeFromPublicInstance} from '../../ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance';
 import {findNodeHandle} from '../../ReactNative/RendererProxy';
-import {getNodeFromPublicInstance} from '../../ReactPrivate/ReactNativePrivateInterface';
 import flattenStyle from '../../StyleSheet/flattenStyle';
 import {AnimatedEvent} from '../AnimatedEvent';
 import AnimatedNode from './AnimatedNode';

packages/react-native/Libraries/ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance.js

@@ -55,6 +55,8 @@ export function createPublicTextInstance(
   return new ReadOnlyText(internalInstanceHandle, ownerDocument);
 }
 
+export type PublicTextInstance = ReturnType<typeof createPublicTextInstance>;
+
 export function getNativeTagFromPublicInstance(
   publicInstance: ReactNativeElement,
 ): number {

packages/react-native/Libraries/ReactPrivate/README

@@ -497,7 +497,7 @@ export type {ErrorUtils} from './Libraries/vendor/core/ErrorUtils';
 export type {
   PublicRootInstance,
   PublicTextInstance,
-} from './Libraries/ReactPrivate/ReactNativePrivateInterface';
+} from './Libraries/ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance';
 
 export type {
   EventSubscription,

packages/react-native/Libraries/ReactPrivate/ReactNativePrivateInitializeCore.js

@@ -14,7 +14,7 @@ import '@react-native/fantom/src/setUpDefaultReactNativeEnvironment';
 import type {Node} from '../../../../../Libraries/Renderer/shims/ReactNativeTypes';
 import type {HostInstance} from 'react-native';
 
-import {getNodeFromPublicInstance} from '../../../../../Libraries/ReactPrivate/ReactNativePrivateInterface';
+import {getNodeFromPublicInstance} from '../../../../../Libraries/ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance';
 import isUnreachable from '../isUnreachable';
 import {
   createShadowNodeReferenceCounter,

packages/react-native/Libraries/ReactPrivate/ReactNativePrivateInterface.js

@@ -16,7 +16,7 @@ import type {HostInstance} from 'react-native';
 
 import isUnreachable from '../../../__tests__/utilities/isUnreachable';
 import {createShadowNodeReferenceCountingRef} from '../../../__tests__/utilities/ShadowNodeReferenceCounter';
-import {getNodeFromPublicInstance} from '../../../../../Libraries/ReactPrivate/ReactNativePrivateInterface';
+import {getNodeFromPublicInstance} from '../../../../../Libraries/ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstance';
 import VirtualView, {_logs, VirtualViewMode} from '../VirtualView';
 import * as Fantom from '@react-native/fantom';
 import nullthrows from 'nullthrows';