Remove Briefcase Warnings

Remove Briefcase Warnings

The next two warnings are there to prompt you to implement code to handle offline data through the Data Abstract Briefcase. In this sample application, you will not be implementing a briefcase, so you can just remove the implementations of the loadDataFromBriefcase and saveDataToBriefcase methods in DataAccess.m.

//DataAccess.m
- (void)loadDataFromBriefcase:(DABriefcase *)briefcase
{
}

- (void)saveDataToBriefcase:(DABriefcase *)briefcase
{
}