Revert race condition introduced in #420, close #463

Author: Stephane Landelle

src/main/java/com/ning/http/client/providers/netty/NettyAsyncHttpProvider.java

@@ -2087,9 +2087,6 @@ public Object call() throws Exception {
                             }
                         };
 
-//                        if (future.getKeepAlive()) {
-//                            future.setReuseChannel(true);
-//                        }
                         if (future.getKeepAlive() && response.isChunked()) {
                             // We must make sure there is no bytes left before executing the next request.
                             ctx.setAttachment(ac);