Apply suggestions from code review

Co-authored-by: Côme Chilliet <91878298+come-nc@users.noreply.github.com>
Signed-off-by: Faraz Samapoor <f.samapoor@gmail.com>

apps/files_versions/lib/Command/CleanUp.php

@@ -115,7 +115,7 @@ class CleanUp extends Command {
 	/**
 	 * delete versions for the given user
 	 */
-	protected function deleteVersions(string $user, string $path = null): void {
+	protected function deleteVersions(string $user, ?string $path = null): void {
 		\OC_Util::tearDownFS();
 		\OC_Util::setupFS($user);
 

apps/files_versions/lib/Command/Expire.php

@@ -53,7 +53,6 @@ class Expire implements ICommand {
 			// In case of external storage and session credentials, the expiration
 			// fails because the command does not have those credentials
 
-			/** @var LoggerInterface $logger */
 			$logger = \OC::$server->get(LoggerInterface::class);
 			$logger->warning($e->getMessage(), [
 				'exception' => $e,