Rollback a change that shoudn't made it there at all

Author: jfarcand

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

@@ -182,7 +182,7 @@ public NettyAsyncHttpProvider(AsyncHttpClientConfig config) {
             socketChannelFactory = new OioClientSocketChannelFactory(config.executorService());
         } else {
             socketChannelFactory = new NioClientSocketChannelFactory(
-                    Executors.newFixedThreadPool(100),
+                    Executors.newCachedThreadPool(),
                     config.executorService());
         }
         plainBootstrap = new ClientBootstrap(socketChannelFactory);