Remove date validation on deathDate

This change removes the `Assert\Date` validation on the `deathDate` property in the `Person` entity. The adjustment allows for more flexible input by not strictly enforcing the date format, which can resolve issues where the date string validation was previously causing errors.

src/Bundle/ChillPersonBundle/Entity/Person.php

@@ -209,7 +209,6 @@ class Person implements HasCenterInterface, TrackCreationInterface, TrackUpdateI
     /**
      * The person's deathdate.
      */
-    #[Assert\Date]
     #[Assert\GreaterThanOrEqual(propertyPath: 'birthdate')]
     #[Assert\LessThanOrEqual('today')]
     #[ORM\Column(type: \Doctrine\DBAL\Types\Types::DATE_IMMUTABLE, nullable: true)]