ISAICP-9017: Revert remarks.

web/modules/custom/joinup_log/src/Entity/JoinupLog.php

@@ -82,6 +82,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type): a
     $fields['variables'] = BaseFieldDefinition::create('map')
       ->setLabel(new TranslatableMarkup('Variables'))
       ->setDefaultValue(serialize([]))
+      ->setRequired(TRUE)
       ->setDescription(new TranslatableMarkup('Serialized array of variables that match the message string and that is passed into the t() function.'));
 
     $fields['severity'] = BaseFieldDefinition::create('list_integer')