minor refactoring

application/src/main/java/org/thingsboard/server/config/SwaggerConfiguration.java

@@ -78,7 +78,6 @@ import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
 import java.util.TreeMap;
-import java.util.TreeSet;
 import java.util.stream.Collectors;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE;

common/data/src/main/java/org/thingsboard/server/common/data/notification/rule/DefaultNotificationRuleRecipientsConfig.java

@@ -25,7 +25,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 
-@Schema(description = "Default notification rule recipients configuration", allOf = NotificationRuleRecipientsConfig.class)
+@Schema(description = "Default notification rule recipients configuration")
 @Data
 @EqualsAndHashCode
 public abstract class DefaultNotificationRuleRecipientsConfig implements NotificationRuleRecipientsConfig {