I am not 100% sure why it was there. I suppose this is to clean up machine exports on `vagrant reload`? I see no harm in left temporarily exports (also, they would be overriden if machine IP is the same). However, we can return it with something like:

```ruby
def self.nfs_export(env, ui, id, ips, folders)
  # ...
  nfs_prune(env, ui, [id])
  # ...
end
```

It will require refactoring `nfs_prune` so different UI actions are logged.