Remove delay module

src/test/notifications-test.js

@@ -8,7 +8,7 @@
 
 const BoxError = require('../boxerror.js'),
     common = require('./common.js'),
-    delay = require('delay'),
+    delay = require('../delay.js'),
     expect = require('expect.js'),
     notifications = require('../notifications.js'),
     safe = require('safetydance');