DX: fix phpstan issues

src/Bundle/ChillCalendarBundle/Controller/CalendarController.php

@@ -544,21 +544,6 @@ class CalendarController extends AbstractController
         return $filterOrder->build();
     }
 
-    private function buildParamsToUrl(?User $user, ?AccompanyingPeriod $accompanyingPeriod): array
-    {
-        $params = [];
-
-        if (null !== $user) {
-            $params['user_id'] = $user->getId();
-        }
-
-        if (null !== $accompanyingPeriod) {
-            $params['id'] = $accompanyingPeriod->getId();
-        }
-
-        return $params;
-    }
-
     /**
      * Creates a form to delete a Calendar entity by id.
      */

src/Bundle/ChillCalendarBundle/Entity/Calendar.php

@@ -29,6 +29,7 @@ use DateTimeImmutable;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\Common\Collections\Criteria;
+use Doctrine\Common\Collections\ReadableCollection;
 use Doctrine\ORM\Mapping as ORM;
 use LogicException;
 use Symfony\Component\Serializer\Annotation as Serializer;
@@ -507,10 +508,10 @@ class Calendar implements TrackCreationInterface, TrackUpdateInterface, HasCente
     }
 
     /**
-     * @return Collection|User[]
+     * @return ReadableCollection<(int|string), User>
      * @Serializer\Groups({"calendar:read", "read"})
      */
-    public function getUsers(): Collection
+    public function getUsers(): ReadableCollection
     {
         return $this->getInvites()->map(static function (Invite $i) {
             return $i->getUser();

src/Bundle/ChillCalendarBundle/Export/Export/CountCalendars.php

@@ -52,7 +52,7 @@ class CountCalendars implements ExportInterface, GroupedExportInterface
         return 'Exports of calendar';
     }
 
-    public function getLabels($key, array $values, $data): Closure
+    public function getLabels($key, array $values, $data)
     {
         if ('export_result' !== $key) {
             throw new LogicException("the key {$key} is not used by this export");