Delete the value in a registration form field.
See https://www.paws-r-sdk.com/docs/pinpointsmsvoicev2_delete_registration_field_value/ for full documentation.
pinpointsmsvoicev2_delete_registration_field_value(RegistrationId, FieldPath)
[required] The unique identifier for the registration.
[required] The path to the registration form field. You can use
describe_registration_field_definitions
for a list of FieldPaths.