Remove unstable System.Net.Requests tests

Remove unstable System.Net.Requests tests

Author: davidsh

src/System.Net.Requests/tests/HttpWebRequestTest.cs

@@ -257,17 +257,6 @@ public void BeginGetRequestStream_CreatePostRequestThenAbort_ThrowsWebException(
             }
         }
 
-        [Theory, MemberData("PostServers")]
-        public void BeginGetRequestStream_CreatePostRequestThenAbort_RequestStreamCallbackCalled(Uri remoteServer)
-        {
-            _savedHttpWebRequest = HttpWebRequest.CreateHttp(remoteServer);
-            _savedHttpWebRequest.Method = "POST";
-
-            IAsyncResult asyncResult = _savedHttpWebRequest.BeginGetRequestStream(new AsyncCallback(RequestStreamCallback), null);
-            _savedHttpWebRequest.Abort();
-            Assert.Equal(1, _requestStreamCallbackCallCount);
-        }
-
         [Theory, MemberData("PostServers")]
         public void BeginGetRequestStream_CreatePostRequestThenCallTwice_ThrowsInvalidOperationException(Uri remoteServer)
         {
@@ -535,19 +524,6 @@ public void SimpleScenario_UsePOSTVerb_Success(Uri remoteServer)
             Assert.Equal(HttpStatusCode.OK, response.StatusCode);
         }
 
-        [Theory, MemberData("PostServers")]
-        public void Abort_BeginGetRequestStreamThenAbort_RequestStreamCallbackCalledBeforeAbortReturns(Uri remoteServer)
-        {
-            _savedHttpWebRequest = HttpWebRequest.CreateHttp(remoteServer);
-            _savedHttpWebRequest.Method = "POST";
-
-            _savedHttpWebRequest.BeginGetRequestStream(new AsyncCallback(RequestStreamCallback), null);
-
-            _savedHttpWebRequest.Abort();
-            _savedHttpWebRequest = null;
-            Assert.Equal(1, _requestStreamCallbackCallCount);
-        }
-
         [Theory, MemberData("PostServers")]
         public void Abort_BeginGetRequestStreamThenAbort_EndGetRequestStreamThrowsWebException(Uri remoteServer)
         {