I have a post type with several custom fields. I want users to be able to delete, but not edit, the content in two fields.
I've been looking around in the documentation and the options in the form building section.
There isn't an option to delete field values as such, in a form you "delete" them by editing them so that they have no value, which highlights the problem of allowing someone to delete a field without editing it.
I suggest that you have an edit form where you don't include inputs for these fields, you simply output the field values (as what looks like disabled inputs), and then include generic checkbox fields next to them where users can mark the field for deletion.