Cleanup: Prefer React.Element over React$?Element

Reviewed By: vjeux

Differential Revision: D4013049

fbshipit-source-id: 18a447fdbc584418d6a51770363bcd221e7fb7dc

Examples/UIExplorer/js/AsyncStorageExample.js

@@ -120,6 +120,6 @@ exports.description = 'Asynchronous local disk storage.';
 exports.examples = [
   {
     title: 'Basics - getItem, setItem, removeItem',
-    render(): ReactElement<any> { return <BasicStorageExample />; }
+    render(): React.Element<any> { return <BasicStorageExample />; }
   },
 ];