cleaning server.js code

ChatService/server.js

@@ -4,9 +4,6 @@ var app            = express();
 var mongoose       = require('mongoose');
 var bodyParser     = require('body-parser');
 var methodOverride = require('method-override');
-var Driver         = require('./app/models/driver');
-var FcmToken       = require('./app/models/fcmtoken');
-var Chat           = require('./app/models/chat');
 // configuration ===========================================
 	
 var port = process.env.PORT || 3000; // set our port