Move sending intern requests from client to server

Summary: This diff moves send intern request from the browser to the server. The reason to make this change is that making such requests from a browser environment causes CORS restrictions to kick in.

Reviewed By: nikoant

Differential Revision: D32835449

fbshipit-source-id: e8e92e51ca963aa50b3c859bb61c2381171e85ae

desktop/flipper-common/src/index.tsx

@@ -42,7 +42,6 @@ export {
   getStringFromErrorLike,
   getErrorFromErrorLike,
 } from './utils/errors';
-export * from './user-session';
 export * from './GK';
 export * from './clientUtils';
 export * from './settings';