removeInformedConsent method
Remove the informed for the given inputByParticipantRole in this
study deployment.
If inputByParticipantRole is not specified, the role of the participant
in the current deployment is used.
Implementation
Future<void> removeInformedConsent([String? inputByParticipantRole]) async {
  ParticipantData.fromJson(await _rpc(SetParticipantData(
    studyDeploymentId,
    {InformedConsentInput.type: null},
    getParticipantRoleName(inputByParticipantRole),
  )));
}