[Developers] Proposed cleanup of redundant properties in the type /book/literary_series

[Bryan Cheung]

A user noticed that the type /book/literary_series has a couple of  
redundant properties.  Values in books_in_this_series and  
stories_in_this_series should be migrated to the property  
works_in_this_series and then removed.  Are there any applications  
that will break if we remove these properties?

Bryan