Fix codestyle in modified files

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/dav/tests/unit/CalDAV/CalendarImplTest.php

@@ -43,7 +43,6 @@ use Sabre\VObject\Reader;
  * @group DB
  */
 class CalendarImplTest extends \Test\TestCase {
-
 	/** @var CalendarImpl */
 	private $calendarImpl;
 

tests/lib/Encryption/UtilTest.php

@@ -3,9 +3,7 @@
 namespace Test\Encryption;
 
 use OC\Encryption\Util;
-use OC\Files\Filesystem;
 use OC\Files\View;
-use OC\User\Manager;
 use OCA\Files_External\Lib\StorageConfig;
 use OCA\Files_External\Service\GlobalStoragesService;
 use OCP\Encryption\IEncryptionModule;
@@ -15,7 +13,6 @@ use OCP\IUserManager;
 use Test\TestCase;
 
 class UtilTest extends TestCase {
-
 	/**
 	 * block size will always be 8192 for a PHP stream
 	 * @see https://bugs.php.net/bug.php?id=21641