Remove SetContentLength and company

Emby.Server.Implementations/SocketSharp/WebSocketSharpResponse.cs

@@ -143,14 +143,6 @@ namespace Emby.Server.Implementations.SocketSharp
             private set;
         }
 
-        public void SetContentLength(long contentLength)
-        {
-            // you can happily set the Content-Length header in Asp.Net
-            // but HttpListener will complain if you do - you have to set ContentLength64 on the response.
-            // workaround: HttpListener throws "The parameter is incorrect" exceptions when we try to set the Content-Length header
-            //_response.ContentLength64 = contentLength;
-        }
-
         public void SetCookie(Cookie cookie)
         {
             var cookieStr = AsHeaderValue(cookie);