remove base middleware

src/DotNetCore.CAP/Dashboard/GatewayProxy/GatewayProxyMiddlewareBase.cs

-using System.Net.Http;
-
-namespace DotNetCore.CAP.Dashboard.GatewayProxy
-{
-    public abstract class GatewayProxyMiddlewareBase
-    {
-        protected IRequestScopedDataRepository _requestScopedDataRepository;
-
-        protected GatewayProxyMiddlewareBase()
-        {
-            MiddlewareName = this.GetType().Name;
-        }
-
-        public string MiddlewareName { get; }
-
-        //public DownstreamRoute DownstreamRoute => _requestScopedDataRepository.Get<DownstreamRoute>("DownstreamRoute");
-
-        public HttpRequestMessage Request => _requestScopedDataRepository.Get<HttpRequestMessage>("Request");
-
-        public HttpRequestMessage DownstreamRequest => _requestScopedDataRepository.Get<HttpRequestMessage>("DownstreamRequest");
-
-        public HttpResponseMessage HttpResponseMessage => _requestScopedDataRepository.Get<HttpResponseMessage>("HttpResponseMessage");
-
-        public void SetUpstreamRequestForThisRequest(HttpRequestMessage request)
-        {
-            _requestScopedDataRepository.Add("Request", request);
-        }
-
-        public void SetDownstreamRequest(HttpRequestMessage request)
-        {
-            _requestScopedDataRepository.Add("DownstreamRequest", request);
-        }
-
-        public void SetHttpResponseMessageThisRequest(HttpResponseMessage responseMessage)
-        {
-            _requestScopedDataRepository.Add("HttpResponseMessage", responseMessage);
-        }
-    }
-}
\ No newline at end of file