Removed call to dead jsonData function.

This is my first pull request - been banging my head on the first exercise in a backbone book (todo mvc), and I finally traced the problem to the version of Backbone.localStorage - so forgive me if I'm doing this wrong.

The visible problem is that calling create on a collection or save on a model will show up correctly in LocalStorage, but when refreshing a page, a call to collection.fetch does not populate the collection from the store. That is, we can write to local storage, but not read from it.

findAll has a vestigial call to a jsonData function - which was removed in favor of the serializer parameter. Since the data variable in findAll was declared twice, I was receiving "object has no method jsonData" errors when calling collection.fetch on a stored collection.