It appears this commit 9d40fe1
changes the cloudFilesProvider.DeleteObject method from returning a response object to void. The documentation in the wiki still shows usage of the response object as a return value. I think this commit may have had similar changes that require updated wiki pages and perhaps other sample code elsewhere.
I am interested also in understanding why the response object as a return was changed and is there a recommended pattern for achieving the same response to the operation? That would also be helpful to add to the wiki and other sample code.