Fix phpstan errors

modules/opd_presentations/src/Events.php

@@ -35,9 +35,6 @@ readonly final class Events implements \Countable, \IteratorAggregate {
       ->filter(fn (Event $event): bool => $event->isPast());
   }
 
-  /**
-   * @param non-empty-string[] $dates
-   */
   public static function fromDateStrings(string ...$dates): self {
     $events = array_map(
       array: $dates,

modules/opd_presentations/src/PresentationCounter.php

@@ -9,8 +9,6 @@ use Drupal\node\NodeInterface;
 
 final class PresentationCounter {
 
-  private array $presentations;
-
   public function __construct(private EntityTypeManagerInterface $entityTypeManager) {
   }
 
@@ -24,6 +22,7 @@ final class PresentationCounter {
 
     $nodeIds = $query->execute();
 
+    /** @var Presentation[] */
     $presentations = $nodeStorage->loadMultiple($nodeIds);
 
     return array_reduce(