def remove_all(domain)
      fail Mailgun::ParameterError('Domain not provided to remove webhooks from') unless domain
      %w(bounce click deliver drop open spam unsubscribe).each do |action|
        delete_webhook domain, action
      end
    end
def remove_all(domain)
      fail Mailgun::ParameterError('Domain not provided to remove webhooks from') unless domain
      %w(bounce click deliver drop open spam unsubscribe).each do |action|
        delete_webhook domain, action
      end
    end
Public: Delete all webhooks for a domain

 domain - A required String of the domain to remove all webhooks for

 Returns a Boolean on the success