Convert dblog entries into entities

Closes #2401463

core/modules/dblog/src/Entity/DblogEntry.php

@@ -3,7 +3,6 @@
 namespace Drupal\dblog\Entity;
 
 use Drupal\Core\Entity\EntityInterface;
-use Drupal\Core\Entity\FieldableEntityInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
 use Drupal\Core\StringTranslation\TranslatableMarkup;