Fix checkstyle

Author: BewareMyPower

pulsar-broker/src/main/java/org/apache/pulsar/broker/service/BrokerService.java

@@ -81,7 +81,6 @@
 import java.util.function.Consumer;
 import java.util.function.Predicate;
 import lombok.AccessLevel;
-import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.Setter;
 import org.apache.bookkeeper.common.util.OrderedExecutor;