restore original tests

Author: thejohnhoffer

packages/history/__tests__/hash-test.js

@@ -146,10 +146,8 @@ export const testHashHistory = (root, createHistory) => {
   });
 }
 
-/*
 describe('a hash history', () => {
   testHashHistory('#/', () => {
     return createHashHistory();
   })  
 });
-*/