Zoho Desk Reports

Zoho Desk Reports

In the report section I can create a report based on Category but not Classification.  Yet for the fields Category is not required and can be removed from the ticket yet Classifications is required and cannot be removed.  The way we are using the Desk these fields would be redundant.  Is there a way to run the reports by Classifications, since it is required, or is there a way to remove the required from Classification so I can remove it from the ticket.