Remove the reload schedules (if any) from these document. Remove any doc cals assigned to those qlikview files. After you've done that you can remove the .qvw files. Alternatively you can remove just the read privileges on the .qvw files. That will prevent the users from seeing the document listed in the access point.
These are just example QlikView documents provided for them to see the capabilities of QlikView. These can be safely removed. Simply go to the documents folder and delete the QlikView documents. If they like to keep them for future reference, they can move it to some other location.
Alternatively, they can also hide the documents from AccessPoint by removing the access to these documents in the QlikView Management Console under the Authorization tab of the document.