Reapply revert of "Make stdout/stderr async"

tests/standalone/io/stdout_test.dart

Index: tests/standalone/io/stdout_test.dart
diff --git a/tests/standalone/io/stdout_test.dart b/tests/standalone/io/stdout_test.dart
deleted file mode 100644
index 57a7e1c5ee2093ad61b72156ed6ffc0aa2bb6811..0000000000000000000000000000000000000000
--- a/tests/standalone/io/stdout_test.dart
+++ /dev/null
@@ -1,22 +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:io";
-
-import "package:expect/expect.dart";
-
-void testTerminalSize() {
-  if (stdout.hasTerminal) {
-    Expect.notEquals(0, stdout.terminalColumns);
-    Expect.notEquals(0, stdout.terminalLines);
-  } else {
-    Expect.throws(() => stdout.terminalColumns, (e) => e is StdoutException);
-    Expect.throws(() => stdout.terminalLines, (e) => e is StdoutException);
-  }
-}
-
-
-void main() {
-  testTerminalSize();
-}