Remove BlobHandler in 10?

[David Eric Pugh]

Hi all, I just finished migrating the Schema Designer from the BlobHandler to 
the Filestore API's.  For fun, I took a spin on remove the .system collection, 
BlobHandler, and related code, and all the tests passed!
Did we already make a decision to deprecate BlobHandler in 9 and remove it in 
10?  I was poking around and didn't quite find it.   
If not, seems like a good opportunity to simplify our lives and reduce the 
number of overlapping API's by doing it now?