Remove dartc optimizing backend.

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

Index: dart/compiler/javatests/com/google/dart/compiler/vm/LibTests.java
diff --git a/dart/compiler/javatests/com/google/dart/compiler/vm/LibTests.java b/dart/compiler/javatests/com/google/dart/compiler/vm/LibTests.java
deleted file mode 100644
index ce0115ac47695e66fdd3ec2043641a39fc2ba0c7..0000000000000000000000000000000000000000
--- a/dart/compiler/javatests/com/google/dart/compiler/vm/LibTests.java
+++ /dev/null
@@ -1,23 +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;
-
-import junit.framework.Test;
-import junit.framework.TestSuite;
-import junit.extensions.TestSetup;
-
-public class LibTests extends TestSetup {
-
-  public LibTests(TestSuite test) {
-    super(test);
-  }
-
-  public static Test suite() {
-    TestSuite suite = new TestSuite("Dart imported library test suite.");
-
-    suite.addTestSuite(ImportedLibTests.class);
-    return new LibTests(suite);
-  }
-}