Remove unused attribute
diff --git a/implementations/axiom-dom/src/main/java/org/apache/axiom/om/impl/dom/DocumentImpl.java b/implementations/axiom-dom/src/main/java/org/apache/axiom/om/impl/dom/DocumentImpl.java
index aae1048..4085811 100644
--- a/implementations/axiom-dom/src/main/java/org/apache/axiom/om/impl/dom/DocumentImpl.java
+++ b/implementations/axiom-dom/src/main/java/org/apache/axiom/om/impl/dom/DocumentImpl.java
@@ -21,8 +21,6 @@
import static org.apache.axiom.dom.DOMExceptionUtil.newDOMException;
-import java.util.Hashtable;
-
import org.apache.axiom.dom.DOMDocument;
import org.apache.axiom.om.impl.intf.AxiomDocument;
import org.w3c.dom.Attr;
@@ -33,8 +31,6 @@
import org.w3c.dom.ProcessingInstruction;
public class DocumentImpl extends ParentNode implements DOMDocument, AxiomDocument {
- protected Hashtable identifiers;
-
public Node importNode(Node importedNode, boolean deep) throws DOMException {
short type = importedNode.getNodeType();
