Fix merge

Author: JamesNK

src/Servers/Kestrel/perf/Microbenchmarks/Http2/Http2FrameWriterBenchmark.cs

@@ -20,7 +20,6 @@ public class Http2FrameWriterBenchmark
     private Pipe _pipe;
     private Http2FrameWriter _frameWriter;
     private HttpResponseHeaders _responseHeaders;
-    private Http2Stream _stream;
 
     [GlobalSetup]
     public void GlobalSetup()
@@ -46,8 +45,6 @@ public void GlobalSetup()
             _memoryPool,
             serviceContext);
 
-        _stream = new MockHttp2Stream(TestContextFactory.CreateHttp2StreamContext(streamId: 0));
-
         _responseHeaders = new HttpResponseHeaders();
         var headers = (IHeaderDictionary)_responseHeaders;
         headers.ContentType = "application/json";
@@ -57,7 +54,7 @@ public void GlobalSetup()
     [Benchmark]
     public void WriteResponseHeaders()
     {
-        _frameWriter.WriteResponseHeaders(_stream, 200, endStream: true, _responseHeaders);
+        _frameWriter.WriteResponseHeaders(streamId: 0, 200, Http2HeadersFrameFlags.END_STREAM, _responseHeaders);
     }
 
     [GlobalCleanup]
@@ -66,16 +63,4 @@ public void Dispose()
         _pipe.Writer.Complete();
         _memoryPool?.Dispose();
     }
-
-    private class MockHttp2Stream : Http2Stream
-    {
-        public MockHttp2Stream(Http2StreamContext context)
-        {
-            Initialize(context);
-        }
-
-        public override void Execute()
-        {
-        }
-    }
 }