use native session dates

backend/app/Auth/EloquentSessionRepository.php

@@ -3,7 +3,6 @@
 namespace App\Auth;
 
 use App\User\UserRepository;
-use Carbon\CarbonInterface;
 use DateTimeImmutable;
 use DateTimeZone;
 
@@ -55,7 +54,7 @@ class EloquentSessionRepository implements SessionRepository
         SessionModel::where('token', $token)->delete();
     }
 
-    private function toUtc(CarbonInterface $dateTime): DateTimeImmutable
+    private function toUtc(DateTimeImmutable $dateTime): DateTimeImmutable
     {
         return DateTimeImmutable::createFromInterface($dateTime)
             ->setTimezone(new DateTimeZone('UTC'));