Revert D99854694

Summary:
This diff reverts D99854694
breaking RL device NUX and provision. T264298738

Depends on D99854694

Differential Revision: D100389649

Author: John Wei

packages/react-native/Libraries/Network/fetch.js

@@ -12,7 +12,7 @@
 
 // side-effectful require() to put fetch,
 // Headers, Request, Response in global scope
-require('./whatwg-fetch');
+require('whatwg-fetch');
 
 export const fetch = global.fetch;
 export const Headers = global.Headers;