Removed redundant imports

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/service/ClusterService.java

@@ -5,7 +5,6 @@ import com.provectus.kafka.ui.cluster.model.ClustersStorage;
 import com.provectus.kafka.ui.cluster.model.ConsumerPosition;
 import com.provectus.kafka.ui.cluster.model.KafkaCluster;
 import com.provectus.kafka.ui.cluster.util.ClusterUtil;
-import com.provectus.kafka.ui.cluster.util.JmxClusterUtil;
 import com.provectus.kafka.ui.kafka.KafkaService;
 import com.provectus.kafka.ui.model.*;
 import lombok.RequiredArgsConstructor;