Unhide 'bzr remove-tree'

[Elliot Murphy]

John Arbash Meinel wrote:
> IIRC, remove-tree was declared hidden, because we weren't sure what to
> call it. We now have had some time to work with it, and I think
> 'remove-tree' is a reasonable name.
> 
> So can we apply this patch?
+1

I think the name is reasonable, I was looking for something named remove
 before I asked about it on IRC this morning.

cheers,
-elliot