modify README

Author: Eniac-Xie

README.md

@@ -6,11 +6,6 @@ To train LeNet on MNIST dataset, just do as follow(you may need some python pack
 1. cd code
 2. python mnist_demo.py
 
-To train cifar-net on cifar dataset, do as follow:
-
-1. cd code
-2. python cifar_demo.py
-
 This is a brief CNN tutorial (from [Jianxin Wu](http://cs.nju.edu.cn/wujx/)'s homepage):
 
 http://cs.nju.edu.cn/_upload/tpl/00/ed/237/template237/paper/CNN.pdf