Remove references to global.nativeExtensions (#41260)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/41260

This was introduced some experiments which are no longer relevant.

Changelog: [Internal]

Reviewed By: yungsters

Differential Revision: D50736166

fbshipit-source-id: 7c9ff571112127e6a9e317113c05c30483626076

packages/react-native/Libraries/BatchedBridge/NativeModules.js

@@ -177,7 +177,7 @@ function updateErrorWithErrorData(
 let NativeModules: {[moduleName: string]: $FlowFixMe, ...} = {};
 if (global.nativeModuleProxy) {
   NativeModules = global.nativeModuleProxy;
-} else if (!global.nativeExtensions) {
+} else {
   const bridgeConfig = global.__fbBatchedBridgeConfig;
   invariant(
     bridgeConfig,

packages/react-native/Libraries/Image/resolveAssetSource.js

@@ -15,6 +15,8 @@
 import type {ResolvedAssetSource} from './AssetSourceResolver';
 import type {ImageSource} from './ImageSource';
 
+import SourceCode from '../NativeModules/specs/NativeSourceCode';
+
 const AssetSourceResolver = require('./AssetSourceResolver');
 const {pickScale} = require('./AssetUtils');
 const AssetRegistry = require('@react-native/assets-registry/registry');
@@ -27,12 +29,7 @@ function getSourceCodeScriptURL(): ?string {
     return _sourceCodeScriptURL;
   }
 
-  let sourceCode =
-    global.nativeExtensions && global.nativeExtensions.SourceCode;
-  if (!sourceCode) {
-    sourceCode = require('../NativeModules/specs/NativeSourceCode').default;
-  }
-  _sourceCodeScriptURL = sourceCode.getConstants().scriptURL;
+  _sourceCodeScriptURL = SourceCode.getConstants().scriptURL;
   return _sourceCodeScriptURL;
 }
 

packages/react-native/Libraries/Utilities/DebugEnvironment.js

@@ -12,8 +12,5 @@ export let isAsyncDebugging: boolean = false;
 
 if (__DEV__) {
   // These native interfaces don't exist in asynchronous debugging environments.
-  isAsyncDebugging =
-    !global.nativeExtensions &&
-    !global.nativeCallSyncHook &&
-    !global.RN$Bridgeless;
+  isAsyncDebugging = !global.nativeCallSyncHook && !global.RN$Bridgeless;
 }

packages/react-native/Libraries/Utilities/Dimensions.js

@@ -110,21 +110,13 @@ class Dimensions {
   }
 }
 
-let initialDims: ?$ReadOnly<DimensionsPayload> =
-  global.nativeExtensions &&
-  global.nativeExtensions.DeviceInfo &&
-  global.nativeExtensions.DeviceInfo.Dimensions;
-if (!initialDims) {
-  // Subscribe before calling getConstants to make sure we don't miss any updates in between.
-  RCTDeviceEventEmitter.addListener(
-    'didUpdateDimensions',
-    (update: DimensionsPayload) => {
-      Dimensions.set(update);
-    },
-  );
-  initialDims = NativeDeviceInfo.getConstants().Dimensions;
-}
-
-Dimensions.set(initialDims);
+// Subscribe before calling getConstants to make sure we don't miss any updates in between.
+RCTDeviceEventEmitter.addListener(
+  'didUpdateDimensions',
+  (update: DimensionsPayload) => {
+    Dimensions.set(update);
+  },
+);
+Dimensions.set(NativeDeviceInfo.getConstants().Dimensions);
 
 export default Dimensions;

packages/react-native/ReactCommon/cxxreact/JSExecutor.h

@@ -45,9 +45,6 @@ class ExecutorDelegate {
       folly::dynamic&& args) = 0;
 };
 
-using NativeExtensionsProvider =
-    std::function<folly::dynamic(const std::string&)>;
-
 class JSExecutorFactory {
  public:
   virtual std::unique_ptr<JSExecutor> createJSExecutor(