Piwik\Plugins\ScheduledReports\ScheduledReports::deleteSiteReport PHP Method

    public function deleteSiteReport($idSite)
    {
        $idReports = API::getInstance()->getReports($idSite);
        foreach ($idReports as $report) {
            $idReport = $report['idreport'];
            API::getInstance()->deleteReport($idReport);
        }
    }