[Developers] Deleting deprecated properties /book/author/book_editions_published and /book/book_edition/author_editor

[Bryan Cheung]

https://bugs.freebase.com/browse/DA-659

Last call for these deprecated properties!

This task was spawned from https://bugs.freebase.com/browse/DA-652 .   
These properties were refactored in DA-652 and subsequently hidden,  
but the properties and links were not deleted.  We'd like to finish  
the refactoring by cleaning up these properties.  I'm planning on  
deleting these properties by early next week, unless I hear a strong  
objection otherwise.

Bryan