rm circular ref

Author: jimmywarting

lib/channel_model.js

@@ -6,7 +6,7 @@
 
 const defs = require('./defs');
 const Promise = require('bluebird');
-const EventEmitter = require('events').EventEmitter;
+const EventEmitter = require('events');
 const BaseChannel = require('./channel').BaseChannel;
 const acceptMessage = require('./channel').acceptMessage;
 const Args = require('./api_args');