Drop WebSocketUpgradeHandler:: touchSuccess

Motivation

This hack was a very old workaround for #317 where the server would
send the first frame along with the handshake.
This issue has actually been fixed for quite some time, we just had to
replace the `UpgradeCallback` with the future before triggering the
read when upgrading the pipeline.

We no longer need this protection as there’s no way the
`UpgradeCallback` can be called twice.

Modification:

Remove dead code.

Result:

Clean code

client/src/main/java/org/asynchttpclient/netty/handler/WebSocketHandler.java

@@ -73,12 +73,10 @@ public UpgradeCallback(NettyResponseFuture<?> future, Channel channel, HttpRespo
         // We don't need to synchronize as replacing the "ws-decoder" will
         // process using the same thread.
         private void invokeOnSucces(Channel channel, WebSocketUpgradeHandler h) {
-            if (!h.touchSuccess()) {
-                try {
-                    h.onSuccess(new NettyWebSocket(channel, responseHeaders.getHeaders()));
-                } catch (Exception ex) {
-                    logger.warn("onSuccess unexpected exception", ex);
-                }
+            try {
+                h.onSuccess(new NettyWebSocket(channel, responseHeaders.getHeaders()));
+            } catch (Exception ex) {
+                logger.warn("onSuccess unexpected exception", ex);
             }
         }
 

client/src/main/java/org/asynchttpclient/ws/WebSocketUpgradeHandler.java

@@ -33,7 +33,6 @@ public class WebSocketUpgradeHandler implements UpgradeHandler<WebSocket>, Async
     private WebSocket webSocket;
     private final List<WebSocketListener> listeners;
     private final AtomicBoolean ok = new AtomicBoolean(false);
-    private boolean onSuccessCalled;
     private int status;
     private List<Runnable> bufferedFrames;
 
@@ -53,11 +52,6 @@ public final void onThrowable(Throwable t) {
         onFailure(t);
     }
 
-    public boolean touchSuccess() {
-        boolean prev = onSuccessCalled;
-        onSuccessCalled = true;
-        return prev;
-    }
 
     @Override
     public final State onBodyPartReceived(HttpResponseBodyPart bodyPart) throws Exception {