Fixed phpstan analysis issues and bad code that showed up with phpstan 2.0

src/Entity/Parts/PartLot.php

@@ -185,7 +185,6 @@ class PartLot extends AbstractDBElement implements TimeStampableInterface, Named
      *
      * @return bool|null True, if the part lot is expired. Returns null, if no expiration date was set.
      *
-     * @throws Exception If an error with the DateTime occurs
      */
     public function isExpired(): ?bool
     {

src/Entity/Parts/Supplier.php

@@ -103,7 +103,7 @@ class Supplier extends AbstractCompany
     protected ?AbstractStructuralDBElement $parent = null;
 
     /**
-     * @var Collection<int, Orderdetail>|Orderdetail[]
+     * @var Collection<int, Orderdetail>
      */
     #[ORM\OneToMany(mappedBy: 'supplier', targetEntity: Orderdetail::class)]
     protected Collection $orderdetails;