[#667] Drop old irrelevant

Signed-off-by: Denis Kirillov <denis@nspcc.ru>

README.md

@@ -54,36 +54,6 @@ $ S3_GW_PEERS_0_ADDRESS=grpcs://192.168.130.72:8080 \
   neofs-s3-gw
 ```
 
-## AWS SDK Compatibility
-
-To match signature of the request you must not include the following headers to `SignedHeaders`:
-* `User-Agent`
-* `X-Amzn-Trace-Id`
-
-### AWS SDK JAVA v1
-Using [aws-sdk-java](https://github.com/aws/aws-sdk-java) you can get the following error:
-```
-Exception in thread "main" com.amazonaws.services.s3.model.AmazonS3Exception: 
-The request signature we calculated does not match the signature you provided. Check your key and signing method.
-```
-
-To solve this problem you should configure client properly:
-```
-RequestHandler2 handler = new RequestHandler2() {
-   @Override
-   public void beforeAttempt(HandlerBeforeAttemptContext context) {
-      context.getRequest().getHeaders().remove("User-Agent");
-      super.beforeAttempt(context);
-   }
-};
-
-AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
-   .withRequestHandlers(handler)
-   .enablePathStyleAccess()
-   // ...
-   .build()
-```
-
 ## Documentation
 
 - [Configuration](./docs/configuration.md)