remove unused express stuff

app.js

@@ -1,8 +1,6 @@
 var createError = require('http-errors');
 var express = require('express');
 var path = require('path');
-var cookieParser = require('cookie-parser');
-var logger = require('morgan');
 
 var indexRouter = require('./routes/index');
 
@@ -12,10 +10,7 @@ var app = express();
 app.set('views', path.join(__dirname, 'views'));
 app.set('view engine', 'pug');
 
-app.use(logger('dev'));
-app.use(express.json());
 app.use(express.urlencoded({ extended: false }));
-app.use(cookieParser());
 app.use(express.static(path.join(__dirname, 'public')));
 
 app.use('/', indexRouter);