Got rid of parent member of AVMNodes. Duplicated data unnecessarily.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3136 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/AVMNode.java

@@ -58,18 +58,6 @@ interface AVMNode
      */
     public void setVersionID(int version);
 
-    /**
-     * Get the (possibly null) parent.
-     * @return The parent or null.
-     */
-    public DirectoryNode getParent();
-
-    /**
-     * Set the parent of this node.
-     * @param parent The DirectoryNode to set.
-     */
-    public void setParent(DirectoryNode parent);
-
     /**
      * Perform a COW if required.
      * @param lPath The lookup path.