def delete_verified_number(self, phone_number=None):
        v = self.get_verified_number(phone_number)
        if v is not None:
            v.retire()
Deletes this contact's phone number from the verified phone number list, freeing it up
dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/sms/mixin.py/CommCareMobileContactMixin.delete_verified_number