Revert "Access to imports in the VM's runtime mirrors. Extend test coverage of the source mirrors."

tests/lib/mirrors/library_imports_bad_metadata_test.dart

Index: tests/lib/mirrors/library_imports_bad_metadata_test.dart
diff --git a/tests/lib/mirrors/library_imports_bad_metadata_test.dart b/tests/lib/mirrors/library_imports_bad_metadata_test.dart
deleted file mode 100644
index 51c756ee59ae646e28a4df9075d93fb7b314f7e4..0000000000000000000000000000000000000000
--- a/tests/lib/mirrors/library_imports_bad_metadata_test.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright (c) 2014, 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.
-
-library test.library_imports_bad_metadata;
-
-@undefined  /// 01: compile-time error
-import 'dart:mirrors';
-import 'package:expect/expect.dart';
-
-main() {
-  LibraryMirror thisLibrary =
-      currentMirrorSystem().findLibrary(#test.library_imports_bad_metadata);
-
-  thisLibrary.libraryDependencies.forEach((dep) {
-    Expect.listEquals([], dep.metadata);
-  });
-}