fix readme

README.md

@@ -151,7 +151,6 @@ Here, `client.predict` function has two arguments. `feed` is a `python dict` wit
 - **Distributed Key-Value indexing** supported which is especially useful for large scale sparse features as model inputs.
 - **Highly concurrent and efficient communication** between clients and servers supported.
 - **Multiple programming languages** supported on client side, such as Golang, C++ and python.
-- **Extensible framework design** which can support model serving beyond Paddle.
 
 <h2 align="center">Document</h2>
 

README_CN.md

@@ -156,7 +156,6 @@ print(fetch_map)
 - 支持 **分布式键值对索引** 助力于大规模稀疏特征作为模型输入.
 - 支持客户端和服务端之间 **高并发和高效通信**.
 - 支持 **多种编程语言** 开发客户端，例如Golang，C++和Python.
-- **可伸缩框架设计** 可支持不限于Paddle的模型服务.
 
 <h2 align="center">文档</h2>