fix: remove wrongly used system address book flag

Signed-off-by: SebastianKrupinski <krupinskis05@gmail.com>

Author: SebastianKrupinski

apps/dav/lib/CardDAV/ContactsManager.php

@@ -48,11 +48,6 @@ public function setupContactsProvider(IManager $cm, $userId, IURLGenerator $urlG
 	 * @param IURLGenerator $urlGenerator
 	 */
 	public function setupSystemContactsProvider(IManager $cm, ?string $userId, IURLGenerator $urlGenerator) {
-		$systemAddressBookExposed = $this->appConfig->getValueBool(Application::APP_ID, ConfigLexicon::SYSTEM_ADDRESSBOOK_EXPOSED);
-		if (!$systemAddressBookExposed) {
-			return;
-		}
-
 		$addressBooks = $this->backend->getAddressBooksForUser('principals/system/system');
 		$this->register($cm, $addressBooks, $urlGenerator, $userId);
 	}

apps/dav/lib/Settings/Admin/SystemAddressBookSettings.php

@@ -28,12 +28,12 @@ public function getSchema(): array {
 			'section_id' => 'groupware',
 			'storage_type' => DeclarativeSettingsTypes::STORAGE_TYPE_EXTERNAL,
 			'title' => $this->l->t('System Address Book'),
-			'description' => $this->l->t('The system address book contains contact information for all users in your instance.'),
+			'description' => $this->l->t('The system address book contains contact information for all users in your instance. The system address book is required for the searching and auto-completion of users.'),
 
 			'fields' => [
 				[
 					'id' => 'system_addressbook_enabled',
-					'title' => $this->l->t('Enable System Address Book'),
+					'title' => $this->l->t('Enable System Address Book in DAV clients'),
 					'type' => DeclarativeSettingsTypes::CHECKBOX,
 					'default' => false,
 					'options' => [],