Remove backends.

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

Index: compiler/java/com/google/dart/compiler/backend/js/ast/JsArrayAccess.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/ast/JsArrayAccess.java b/compiler/java/com/google/dart/compiler/backend/js/ast/JsArrayAccess.java
deleted file mode 100644
index 46df510808608da7d72d086d507734e9408f1cf2..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/ast/JsArrayAccess.java
+++ /dev/null
@@ -1,68 +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 expression for array access.
- */
-public final class JsArrayAccess extends JsExpression {
-
-  private JsExpression arrayExpr;
-  private JsExpression indexExpr;
-
-  public JsArrayAccess() {
-    super();
-  }
-
-  public JsArrayAccess(JsExpression arrayExpr, JsExpression indexExpr) {
-    this.arrayExpr = arrayExpr;
-    this.indexExpr = indexExpr;
-  }
-
-  public JsExpression getArrayExpr() {
-    return arrayExpr;
-  }
-
-  public JsExpression getIndexExpr() {
-    return indexExpr;
-  }
-
-  @Override
-  public boolean hasSideEffects() {
-    return arrayExpr.hasSideEffects() || indexExpr.hasSideEffects();
-  }
-
-  @Override
-  public boolean isDefinitelyNotNull() {
-    return false;
-  }
-
-  @Override
-  public boolean isDefinitelyNull() {
-    return false;
-  }
-
-  public void setArrayExpr(JsExpression arrayExpr) {
-    this.arrayExpr = arrayExpr;
-  }
-
-  public void setIndexExpr(JsExpression indexExpr) {
-    this.indexExpr = indexExpr;
-  }
-
-  @Override
-  public void traverse(JsVisitor v, JsContext ctx) {
-    if (v.visit(this, ctx)) {
-      arrayExpr = v.accept(arrayExpr);
-      indexExpr = v.accept(indexExpr);
-    }
-    v.endVisit(this, ctx);
-  }
-
-  @Override
-  public NodeKind getKind() {
-    return NodeKind.ARRAY_ACCESS;
-  }
-}