update readme

README.md

@@ -12,15 +12,7 @@ Supported are two distinct ways of reading from s3 storage.
 
 ## Configuration
 **astropy 需升级至 5.3**  
-**老写法同时兼容本地nas和云上s3，只要读路径以s3:// 协议开头会自动识别**  
-
-如果需要读S3时，需要传入s3的密钥和endpoint等配置，有两种方法可选
-S3 credentials and options are set to working default values. They can be overwritten if needed, e.g.
-S3_KEY=dummy_key
-S3_SECRET=dummy_secret
-S3_ENDPOINT_URL=http://oss-cn-hangzhou-zjy-d01-a.ops.cloud.zhejianglab.com 
-S3_BUCKET=data-and-computing
-
+**老写法同时兼容本地nas和云上s3，只要读路径以s3:// 协议开头会自动识别**
 
 ## 从s3下载到本地
 ```python