Clean up process globals

Summary: Cleaned up some `process` references

Reviewed By: passy

Differential Revision: D33184882

fbshipit-source-id: 6fc56bcea4e145ba97aa8bf9e689e53e2bf239cc

desktop/flipper-common/src/index.tsx

@@ -20,6 +20,7 @@ export * from './server-types';
 export {sleep} from './utils/sleep';
 export {timeout} from './utils/timeout';
 export {isTest} from './utils/isTest';
+export {isProduction} from './utils/isProduction';
 export {assertNever} from './utils/assertNever';
 export {fsConstants} from './utils/fsConstants';
 export {