RFC remove the query from uncommit

[Ian Clatworthy]

John Arbash Meinel wrote:
> At the moment 'bzr uncommit' prompts you to make sure you really want to
> do so. I wrote it that way originally because I actually removed the
> content from disk. (This was back in the one-file-per-revision .txt.gz
> days.)
> 
> We don't do that anymore, and you can always recover from uncommit. And
> we even tell the user what they can do to recover ('bzr pull . -r ...')

+1 from me. Please test the end result with quncommit though to make
sure whatever we display makes sense to GUI users. (I realise quncommit
could go in at a lower level but right now it connects via the cli iirc).

Ian C.