Revert "Update README.md"

This reverts commit dbe99bcf4d675809d9c48b5c0706f840c9467b0b.
Update README.md
Merge pull request #1 from 312998164/master

更新Readme.md文件
Delete 基础实例.txt
Update README.md
Merge pull request #1 from BestKind/master

更新Readme.md文件