Craft\AmForms_FormsService::deleteForm PHP Method

    public function deleteForm(AmForms_FormModel $form)
    {
        $transaction = craft()->db->getCurrentTransaction() === null ? craft()->db->beginTransaction() : null;
        try {
            // Delete export files
            craft()->amForms_exports->deleteExportFilesForForm($form);
            // Delete the field layout
            craft()->fields->deleteLayoutById($form->fieldLayoutId);
            // Delete submission elements
            $submissionIds = craft()->db->createCommand()->select('id')->from('amforms_submissions')->where(array('formId' => $form->id))->queryColumn();
            craft()->elements->deleteElementById($submissionIds);
            // Delete the element and form
            craft()->elements->deleteElementById($form->id);
            if ($transaction !== null) {
                $transaction->commit();
            }
            return true;
        } catch (\Exception $e) {
            if ($transaction !== null) {
                $transaction->rollback();
            }
            throw $e;
        }
        return false;
    }