Remove backends.

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

Index: compiler/java/com/google/dart/compiler/backend/js/ast/JsBooleanLiteral.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/ast/JsBooleanLiteral.java b/compiler/java/com/google/dart/compiler/backend/js/ast/JsBooleanLiteral.java
deleted file mode 100644
index 12238ddbb024bf9351424199f32934e2daec9100..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/ast/JsBooleanLiteral.java
+++ /dev/null
@@ -1,53 +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;
-
-/**
- * Represents a JavaScript literal boolean expression.
- */
-public final class JsBooleanLiteral extends JsValueLiteral {
-
-  private final boolean value;
-
-  // Should be interned by JsProgram
-  JsBooleanLiteral(boolean value) {
-    this.value = value;
-  }
-
-  public boolean getValue() {
-    return value;
-  }
-
-  @Override
-  public boolean isBooleanFalse() {
-    return value == false;
-  }
-
-  @Override
-  public boolean isBooleanTrue() {
-    return value == true;
-  }
-
-  @Override
-  public boolean isDefinitelyNotNull() {
-    return true;
-  }
-
-  @Override
-  public boolean isDefinitelyNull() {
-    return false;
-  }
-
-  @Override
-  public void traverse(JsVisitor v, JsContext ctx) {
-    v.visit(this, ctx);
-    v.endVisit(this, ctx);
-  }
-
-  @Override
-  public NodeKind getKind() {
-    return NodeKind.BOOLEAN;
-  }
-}