Merge pull request #1931 from jayphelps/unused

chore(root): remove unused module/exports checking code

Author: kwonoj

src/util/root.ts

@@ -20,11 +20,7 @@ declare module NodeJS {
 
 export let root: any = (objectTypes[typeof self] && self) || (objectTypes[typeof window] && window);
 
-/* tslint:disable:no-unused-variable */
-let freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
-let freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
 let freeGlobal = objectTypes[typeof global] && global;
-
 if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
   root = freeGlobal;
 }