Removed natural-key declaration from node_assoc table

- This was a nice idea, but mandates that we flush the deleted associations before recreating them (ala version service restore).
 - For now, we can leave this off


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2875 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/node/db/NodeDaoService.java

@@ -16,7 +16,6 @@
  */
 package org.alfresco.repo.node.db;
 
-import java.util.Collection;
 import java.util.List;
 
 import org.alfresco.repo.domain.ChildAssoc;
@@ -173,16 +172,6 @@ public interface NodeDaoService
             Node targetNode,
             QName assocTypeQName);
     
-    /**
-     * @return Returns the target nodes for the association
-     */
-    public Collection<Node> getNodeAssocTargets(Node sourceNode, QName assocTypeQName);
-    
-    /**
-     * @return Returns the source nodes for the association
-     */
-    public Collection<Node> getNodeAssocSources(Node targetNode, QName assocTypeQName);
-    
     /**
      * @param assoc the node association to remove
      */