Delete old tests that aren't used and/or useful any more.

tests/utils/dummy.dart

Index: tests/utils/dummy.dart
diff --git a/tests/utils/dummy.dart b/tests/utils/dummy.dart
deleted file mode 100644
index f7f9c5c0aa2e25fea49e9c83d6d55418d0f9fbd6..0000000000000000000000000000000000000000
--- a/tests/utils/dummy.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright (c) 2011, 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.
-
-// A dummy library for testing dartdoc name references.
-library dummy;
-
-topLevelMethod() => null;
-
-class Class {
-  Class() => null;
-  Class.namedConstructor() => null;
-  method(param) => null;
-  get getterOnly => null;
-  get getterAndSetter => null;
-  set getterAndSetter(val) => null;
-  set setterOnly(val) => null;
-}