Deleting Demantra worksheets

We have many worksheets that are not used anymore. I would like to clean this up. I found this document in Oracle Metalink.

Oracle Demantra User's Guide

Release 7.3

Part Number E05072-06

Deleting Worksheets

You can delete a worksheet if you are its owner.

To delete a worksheet

1. Open the worksheet.
2. Click File > Delete. Or click the Delete button.

   Oracle Demantra prompts you to confirm the deletion.

3. Click Yes or No.

Is there a superuser function where we can delete worksheets even if you are not the owner? We have over a hundred worksheets we would like to delete. I do not know the owner of each worksheet. We've had consultants create worksheets over the years.