Remove backends.

compiler/javatests/com/google/dart/compiler/backend/js/testConstructorOptTest.dart

Index: compiler/javatests/com/google/dart/compiler/backend/js/testConstructorOptTest.dart
diff --git a/compiler/javatests/com/google/dart/compiler/backend/js/testConstructorOptTest.dart b/compiler/javatests/com/google/dart/compiler/backend/js/testConstructorOptTest.dart
deleted file mode 100644
index 3e019404ae6f50cbd2326e45c4b083b46d18b6ed..0000000000000000000000000000000000000000
--- a/compiler/javatests/com/google/dart/compiler/backend/js/testConstructorOptTest.dart
+++ /dev/null
@@ -1,37 +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.
-
-class AAA {
-  int a;
-  int b = 567;
-  AAA(this.a) : this.c = 123 { }
-  int c;
-  int d;
-}
-
-class BBB {
-  int a;
-  int b = 567;
-  int c;
-  BBB(this.a) { }
-}
-
-class CCC extends BBB {
-  int d;
-  CCC(x) : d = x, super(x) { }
-}
-
-class DDD {
-  int x;
-  int z;
-  DDD(this.x, [this.z = 123]);
-  void foo() {
-    new DDD(1);
-  }
-}
-
-main() {
-  AAA _a_marker = new AAA(123);
-  BBB _b_marker = new BBB(999);
-}