Remove backends.

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

Index: compiler/java/com/google/dart/compiler/backend/js/ast/JsInvocation.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/ast/JsInvocation.java b/compiler/java/com/google/dart/compiler/backend/js/ast/JsInvocation.java
deleted file mode 100644
index beb10a1eeed307f2bfc49f918ccd633eae07f784..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/ast/JsInvocation.java
+++ /dev/null
@@ -1,62 +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;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Represents a JavaScript invocation.
- */
-public final class JsInvocation extends JsExpression implements HasArguments {
-
-  private final List<JsExpression> args = new ArrayList<JsExpression>();
-  private JsExpression qualifier;
-
-  public JsInvocation() {
-  }
-
-  @Override
-  public List<JsExpression> getArguments() {
-    return args;
-  }
-
-  public JsExpression getQualifier() {
-    return qualifier;
-  }
-
-  @Override
-  public boolean hasSideEffects() {
-    return true;
-  }
-
-  @Override
-  public boolean isDefinitelyNotNull() {
-    return false;
-  }
-
-  @Override
-  public boolean isDefinitelyNull() {
-    return false;
-  }
-
-  public void setQualifier(JsExpression qualifier) {
-    this.qualifier = qualifier;
-  }
-
-  @Override
-  public void traverse(JsVisitor v, JsContext ctx) {
-    if (v.visit(this, ctx)) {
-      qualifier = v.accept(qualifier);
-      v.acceptList(args);
-    }
-    v.endVisit(this, ctx);
-  }
-
-  @Override
-  public NodeKind getKind() {
-    return NodeKind.INVOKE;
-  }
-}