Remove usage of deprecated Role class

src/Bundle/ChillEventBundle/Form/EventType.php

@@ -59,7 +59,7 @@ class EventType extends AbstractType
         $resolver
             ->setRequired(['center', 'role'])
             ->setAllowedTypes('center', Center::class)
-            ->setAllowedTypes('role', Role::class);
+            ->setAllowedTypes('role', 'string');
     }
 
     /**

src/Bundle/ChillEventBundle/Form/Type/PickEventType.php

@@ -74,7 +74,7 @@ final class PickEventType extends AbstractType
             ->setDefault('centers', null);
         $resolver
             ->setDefined('role')
-            ->addAllowedTypes('role', [Role::class, 'null'])
+            ->addAllowedTypes('role', ['string', 'null'])
             ->setDefault('role', null);
 
         // add the default options