Remove dartc optimizing backend.

dart/compiler/javatests/com/google/dart/compiler/vm/ImportedLibOptTest.java

Index: dart/compiler/javatests/com/google/dart/compiler/vm/ImportedLibOptTest.java
diff --git a/dart/compiler/javatests/com/google/dart/compiler/vm/ImportedLibOptTest.java b/dart/compiler/javatests/com/google/dart/compiler/vm/ImportedLibOptTest.java
deleted file mode 100644
index dfaa4c95c4f4dfbd02daad5156ef427aed2880f5..0000000000000000000000000000000000000000
--- a/dart/compiler/javatests/com/google/dart/compiler/vm/ImportedLibOptTest.java
+++ /dev/null
@@ -1,17 +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.
-
-package com.google.dart.compiler.vm;
-
-public class ImportedLibOptTest extends ImportedLibTests {
-  @Override
-  protected void runNegativeTest(String testName, String... commandArray) {
-    super.runNegativeTest(testName, addOptimizeOption(commandArray));
-  }
-
-  @Override
-  protected void runPositiveTest(String testName, String... commandArray) throws Throwable {
-    super.runPositiveTest(testName, addOptimizeOption(commandArray));
-  }
-}