Light cleanup

Author: jbaiera

x-pack/plugin/ilm/src/main/java/org/elasticsearch/xpack/ilm/PutLifecycleMetadataService.java

@@ -15,7 +15,6 @@
 import org.elasticsearch.cluster.AckedClusterStateUpdateTask;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.ClusterStateAckListener;
-import org.elasticsearch.cluster.ClusterStateUpdateTask;
 import org.elasticsearch.cluster.ProjectState;
 import org.elasticsearch.cluster.SimpleBatchedAckListenerTaskExecutor;
 import org.elasticsearch.cluster.metadata.ProjectId;
@@ -26,7 +25,6 @@
 import org.elasticsearch.cluster.service.MasterServiceTaskQueue;
 import org.elasticsearch.common.Priority;
 import org.elasticsearch.core.Nullable;
-import org.elasticsearch.core.SuppressForbidden;
 import org.elasticsearch.core.Tuple;
 import org.elasticsearch.license.XPackLicenseState;
 import org.elasticsearch.reservedstate.ReservedClusterStateHandler;
@@ -58,7 +56,6 @@ public class PutLifecycleMetadataService {
 
     private static final Logger logger = LogManager.getLogger(PutLifecycleMetadataService.class);
 
-    private final ClusterService clusterService;
     private final NamedXContentRegistry xContentRegistry;
     private final Client client;
     private final XPackLicenseState licenseState;
@@ -74,7 +71,6 @@ public PutLifecycleMetadataService(
         ThreadPool threadPool,
         ProjectResolver projectResolver
     ) {
-        this.clusterService = clusterService;
         this.xContentRegistry = xContentRegistry;
         this.client = client;
         this.licenseState = licenseState;
@@ -83,11 +79,6 @@ public PutLifecycleMetadataService(
         this.taskQueue = clusterService.createTaskQueue("ilm-put-lifecycle-queue", Priority.NORMAL, new IlmLifecycleExecutor());
     }
 
-    @SuppressForbidden(reason = "legacy usage of unbatched task") // TODO add support for batching here
-    private void submitUnbatchedTask(@SuppressWarnings("SameParameterValue") String source, ClusterStateUpdateTask task) {
-        clusterService.submitUnbatchedStateUpdateTask(source, task);
-    }
-
     public void addLifecycle(PutLifecycleRequest request, ClusterState state, ActionListener<AcknowledgedResponse> listener) {
         // headers from the thread context stored by the AuthenticationService to be shared between the
         // REST layer and the Transport layer here must be accessed within this thread and not in the