code: public function unclaim($id)
      {
          $options = [
              'headers' => [
                  'Accept' => 'application/json',
                  'Content-Type' => 'application/json'
              ]
          ];
          $resource = str_replace('{id}', $id, static::RESOURCE_UNCLAIM);
          $this->execute('POST', $resource, $options);
      }
docs: Unclaim task
  
  @param string $id