Remove the fixed ref for windows cookbook

A problem with windows chef cookbook has already been fixed in upstream version `1.12.6` ([COOK-4168](https://tickets.opscode.com/browse/COOK-4168)).

* hard-coded ref to old version of windows cookbook (`1.11.1`) is not required any more so has been removed
* re-generated Cheffile.lock to reflect above change and also #200