Remove unnecessary code

The issue summary should always describe what should be fixed/changed. A sentence like I have removed some unnecessary code is not a sufficient description. Why is the code unnecessary? What is this issue trying to resolve?

-/**
- * Defines the OAuth2 server authorization code entity.
- *
- * @ContentEntityType(
- *   id = "oauth2_server_authorization_code",
- *   label = @Translation("OAuth2 Server Authorization Code"),
- *   base_table = "oauth2_server_authorization_code",
- *   admin_permission = "administer oauth2 server",
- *   fieldable = FALSE,
- *   translatable = FALSE,
- *   entity_keys = {
- *     "id" = "code_id",
- *     "label" = "uid"
- *   }
- * )
- */
 class AuthorizationCode extends ContentEntityBase implements AuthorizationCodeInterface {

Annotations are not unnecessary code. Without them, Drupal core does not recognize plugins classes, including content entity classes.

There is nothing to change as per this issue.