Don't send a kick to the server on disconnect

This was dropped from the protocol in 1.6 and was left in bungee by
mistake

proxy/src/main/java/net/md_5/bungee/ServerConnection.java

@@ -54,16 +54,7 @@ public class ServerConnection implements Server
     {
         if ( !ch.isClosed() )
         {
-            // TODO: Can we just use a future here?
-            unsafe().sendPacket( new Kick( ComponentSerializer.toString( reason ) ) );
-            ch.getHandle().eventLoop().schedule( new Runnable()
-            {
-                @Override
-                public void run()
-                {
-                    ch.getHandle().close();
-                }
-            }, 100, TimeUnit.MILLISECONDS );
+            ch.getHandle().close();
         }
 
     }