Hide Separators 

Is it possible to hide separators in the alertController ? Generally in a tableView we can, 

Using objective-C, we have:

``` objective-c
[self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];
```

Using Swift we have:

``` swift
self.tableView.separatorStyle = UITableViewCellSeparatorStyle.None
```
