Update README.md

Author: GiggleLiu

README.md

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 # QuAlgorithmZoo
 
-[![Build Status](https://travis-ci.org/QuantumBFS/QuAlgorithmZoo.jl.svg?branch=master)](https://travis-ci.org/QuantumBFS/QuAlgorithmZoo.jl)
-[![Build status](https://ci.appveyor.com/api/projects/status/wdbroxclvf1nhsen/branch/master?svg=true)](https://ci.appveyor.com/project/Roger-luo/qualgorithmzoo-jl/branch/master)
-[![](https://img.shields.io/badge/docs-stable-blue.svg)](https://quantumbfs.github.io/QuAlgorithmZoo.jl/stable/)
-[![](https://img.shields.io/badge/docs-latest-blue.svg)](https://quantumbfs.github.io/QuAlgorithmZoo.jl/latest/)
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 A curated implementation of quantum algorithms with [Yao.jl](https://github.com/QuantumBFS/Yao.jl)
 
 *Note*: part of functionalities has been moved to [YaoExtensions](https://github.com/QuantumBFS/YaoExtensions.jl).