Update README.md

Author: swhitty

README.md

@@ -18,8 +18,7 @@
     - [Socket](#socket)
     - [AsyncSocket](#asyncsocket)
         - [AsyncSocketPool](#asyncsocketpool)
-        - [PollingSocketPool](#pollingsocketpool)
-        - [EventQueueSocketPool](#eventqueuesocketpool)
+        - [SocketPool](#socketpool)
     - [SocketAddress](#socketaddress)
 - [Command Line App](#command-line-app)
 - [Credits](#credits)