Update README.md

Author: popolee0513

README.md

@@ -6,8 +6,6 @@ Note
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 [Association Rules Generation from Frequent Itemsets](http://rasbt.github.io/mlxtend/user_guide/frequent_patterns/association_rules/)
 
-[regular expression](https://morvanzhou.github.io/tutorials/python-basic/basic/13-10-regular-expression/)
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 [nlargest()](https://zhuanlan.zhihu.com/p/30402355)
 
 [Running Python from the Task Scheduler](https://jennaweng0621.pixnet.net/blog/post/404175047-%E4%BD%BF%E7%94%A8%E5%B7%A5%E4%BD%9C%E6%8E%92%E7%A8%8B%E5%99%A8%E5%9F%B7%E8%A1%8Canaconda%E7%92%B0%E5%A2%83%E7%9A%84%E7%A8%8B%E5%BC%8F)