Remove server socket references

tests/standalone/io/server_socket_reference_issue21383_and_issue21384_test.dart

Index: tests/standalone/io/server_socket_reference_issue21383_and_issue21384_test.dart
diff --git a/tests/standalone/io/server_socket_reference_issue21383_and_issue21384_test.dart b/tests/standalone/io/server_socket_reference_issue21383_and_issue21384_test.dart
deleted file mode 100644
index 95e0363ca7489f38225efdc255241f1c1b0856cf..0000000000000000000000000000000000000000
--- a/tests/standalone/io/server_socket_reference_issue21383_and_issue21384_test.dart
+++ /dev/null
@@ -1,73 +0,0 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import 'dart:async';
-import 'dart:io';
-
-import 'package:async_helper/async_helper.dart';
-
-
-testBothListen() {
-  asyncStart();
-  ServerSocket.bind('127.0.0.1', 0).then((mainServer) {
-    mainServer.reference.create().then((refServer) {
-      refServer.listen((_) {});
-      mainServer.listen((_) {});
-      Timer.run(() {
-        mainServer.close();
-        refServer.close();
-        asyncEnd();
-      });
-    });
-  });
-}
-
-testRefServerListen() {
-  asyncStart();
-  ServerSocket.bind('127.0.0.1', 0).then((mainServer) {
-    mainServer.reference.create().then((refServer) {
-      refServer.listen((_) {});
-      Timer.run(() {
-        mainServer.close();
-        refServer.close();
-        asyncEnd();
-      });
-    });
-  });
-}
-
-testMainServerListen() {
-  asyncStart();
-  ServerSocket.bind('127.0.0.1', 0).then((mainServer) {
-    mainServer.reference.create().then((refServer) {
-      mainServer.listen((_) {});
-      Timer.run(() {
-        mainServer.close();
-        refServer.close();
-        asyncEnd();
-      });
-    });
-  });
-}
-
-testNoneListen() {
-  asyncStart();
-  ServerSocket.bind('127.0.0.1', 0).then((mainServer) {
-    mainServer.reference.create().then((refServer) {
-      Timer.run(() {
-        mainServer.close();
-        refServer.close();
-        asyncEnd();
-      });
-    });
-  });
-}
-
-main() {
-  testNoneListen();
-  testMainServerListen();
-  testRefServerListen();
-  testBothListen();
-}
-