I've deleted some files, but their content remains in the objects directory, and git annex unused does not list them.

I've read in this post http://git-annex.branchable.com/forum/git-annex_unused_not_dropping_deleted_files/ that if other branches contain the files, then it won't count them as unused. My repo appears to have a few branches left over from views I've used.


How can I delete these? Is git annex going to create a new branch for every new view I create?