Remove backends.

compiler/java/com/google/dart/compiler/backend/js/ast/HasCondition.java

Index: compiler/java/com/google/dart/compiler/backend/js/ast/HasCondition.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/ast/HasCondition.java b/compiler/java/com/google/dart/compiler/backend/js/ast/HasCondition.java
deleted file mode 100644
index 082f4e15eb34f6452a0e38943243a56142cc22a1..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/ast/HasCondition.java
+++ /dev/null
@@ -1,15 +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.backend.js.ast;
-
-/**
- * Implemented by JavaScript objects with conditional execution.
- */
-public interface HasCondition {
-
-  JsExpression getCondition();
-
-  void setCondition(JsExpression condition);
-}