We have a few options through the system preferences to hide fields in the OPAC, such as OPACShowBarcode which allows you to show or hide the barcode on the holdings tab and OPACShowHoldQueueDetails which allows you to show or hide the holds priority to patrons in the OPAC. It would be great to have a system preference to show or hide the duedate on the holdings tab, like an option for OPACShowDueDate.
This can now be done using the column configuration interface :)