diff --git a/websocket-sharp/WebSocketFrame.cs b/websocket-sharp/WebSocketFrame.cs
index 2433f345..adc38bc0 100644
--- a/websocket-sharp/WebSocketFrame.cs
+++ b/websocket-sharp/WebSocketFrame.cs
@@ -708,24 +708,6 @@ Extended Payload Length: {7}
 
     internal static void ReadAsync (
       Stream stream, bool unmask, Action<WebSocketFrame> completed, Action<Exception> error)
-    {
-      readHeaderAsync (
-        stream,
-        frame => {
-          readExtendedPayloadLength (stream, frame);
-          readMaskingKey (stream, frame);
-          readPayloadData (stream, frame);
-
-          if (unmask)
-            frame.Unmask ();
-
-          completed (frame);
-        },
-        error);
-    }
-
-    internal static void ReadAsync2 (
-      Stream stream, bool unmask, Action<WebSocketFrame> completed, Action<Exception> error)
     {
       readHeaderAsync (
         stream,