Update lib/adapters/neo4j.js

removing the change to delete the id property in the cleanup since that fails the unit test

lib/adapters/neo4j.js

@@ -343,8 +343,6 @@ Neo4j.prototype.updateAttributes = function updateAttributes(model, id, data, cb
 function cleanup(data) {
     if (!data) return null;
     
-    //don't save an id property on update since there is already a node id from neo4j
-    delete data.id;
     var res = {};
     Object.keys(data).forEach(function (key) {
         var v = data[key];