Ability to hide/delete Authorised Purchase Requisitions

Potentially there can be situations where Purchase Requisitions are authorised but it is then decided the Purchase Order isnt needed or some details of the requisition are incorrect. Currently the only way to remove these from the Generate Purchase Orders from Requisitions is by creating the Purchase Order but deleting the order will repopulate the same requisition into the form again. Would be useful to have an option to hide or delete the authorised purchase requisitions from this form.