Updated CMS_NODE_STORAGE_I API.

Delete a node using a node as formal parameter instead of node id.
Clean code and update log information.

modules/node/persistence/cms_node_storage_null.e

@@ -106,7 +106,7 @@ feature -- Node
 		do
 		end
 
-	delete_node_by_id (a_id: INTEGER_64)
+	delete_node_base (a_node: CMS_NODE)
 			-- <Precursor>
 		do
 		end