Remove Attr child nodes (making Attr a Node, not a ContainerNode)

LayoutTests/dom/html/level1/core/hc_attrclonenode1.js

 /*
 Copyright © 2001-2004 World Wide Web Consortium,
 (Massachusetts Institute of Technology, European Research Consortium
 for Informatics and Mathematics, Keio University). All
 Rights Reserved. This work is distributed under the W3C® Software License [1] in the
 hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
 [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
 */
@@ skipping 66 matching lines @@
 */
 function hc_attrclonenode1() {
    var success;
     if(checkInitialization(builder, "hc_attrclonenode1") != null) return;
     var doc;
       var acronymList;
       var testNode;
       var attributes;
       var titleAttr;
       var value;
-      var textNode;
-      var retval;
-      var lastChild;
       var clonedTitle;
 
       var docRef = null;
       if (typeof(this.doc) != 'undefined') {
         docRef = this.doc;
       }
       doc = load(docRef, "doc", "hc_staff");
       acronymList = doc.getElementsByTagName("acronym");
       testNode = acronymList.item(3);
       attributes = testNode.attributes;
 
       titleAttr = attributes.getNamedItem("title");
-      textNode = doc.createTextNode("terday");
-      retval = titleAttr.appendChild(textNode);
       clonedTitle = titleAttr.cloneNode(false);
-      textNode.nodeValue = "text_node_not_cloned";
 
       value = clonedTitle.value;
+      assertEquals("attrValue","Yes",value);
 
-      assertEquals("attrValue","Yesterday",value);
-       value = clonedTitle.nodeValue;
-
-      assertEquals("attrNodeValue","Yesterday",value);
-       lastChild = clonedTitle.lastChild;
-
-      value = lastChild.nodeValue;
-
-      assertEquals("lastChildValue","terday",value);
-
+      value = clonedTitle.nodeValue;
+      assertEquals("attrNodeValue","Yes",value);
 }
 
 function runTest() {
    hc_attrclonenode1();
 }