DocumentGeneratorManager::deleteDocumentActivity

private function deleteDocumentActivity(int $documentId): void
{
	$activity = \CCrmActivity::GetList(
		[],
		[
			'TYPE_ID' => \CCrmActivityType::Provider,
			'PROVIDER_ID' => \Bitrix\Crm\Activity\Provider\Document::getId(),
			'PROVIDER_TYPE_ID' => \Bitrix\Crm\Activity\Provider\Document::PROVIDER_TYPE_ID_DOCUMENT,
			'ASSOCIATED_ENTITY_ID' => $documentId,
		],
		false,
		false,
	)->Fetch();

	if ($activity)
	{
		\CCrmActivity::Delete($activity['ID'], false);
		$this->removeActivityFromCache($activity);
	}
}