Fix for issue 4429 - remove #resource directive

compiler/java/com/google/dart/compiler/ast/DartResourceDirective.java

-// Copyright (c) 2012, 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.ast;
-
-/**
- * Implements the #resource directive.
- */
-public class DartResourceDirective extends DartDirective {
-  private DartStringLiteral resourceUri;
-
-  public DartResourceDirective(DartStringLiteral resourceUri) {
-    this.resourceUri = becomeParentOf(resourceUri);
-  }
-
-  public DartStringLiteral getResourceUri() {
-    return resourceUri;
-  }
-
-  @Override
-  public void visitChildren(ASTVisitor<?> visitor) {
-    safelyVisitChild(resourceUri, visitor);
-  }
-
-  @Override
-  public <R> R accept(ASTVisitor<R> visitor) {
-    return visitor.visitResourceDirective(this);
-  }
-}