I just doublechecked on the demo site (running 3.7.1) and it performed as it usually does.
Scroll down, choose bulk action
Click the "apply' next to the bulk action
(NOT THE APPLY NEXT TO THE PER PAGE)
The userids selected on that page get passed to the normal wordpress multi user delete screen.
Click delete posts (or choose user ...)
WordPress then confirms in yellow box at top how many users deleted (wp thing not mine).
If you click the 'apply' next to the per page this will just changed the per page settings and may look like nothing happens.
You must choose delete else nothing will happen which you click.
And of course depending on your settings, you may need to rebuild the cache for the report to update.