@m_v,
Great question. I don't believe there is an easy way to "delete" specifically. However you can overwrite the data by passing in new info with the same ID I supposed you could pass in all null or blank values however it's really a matter of just using what you need from the running list of customer attributes. More documentation on customer attributes here: Customer attributes
If this satisfies your query please like, mark as helpful and mark as answer. Otherwise lets keep the conversation going. Hope you have a wonderful day.
Mihnea Docea | Technical Support Consultant | Customer Experience | Adobe | (:: 1 (800) 497-0335
