Remove UpdateForV9 import from FullClusterRestartIT.java

Author: arpadkiraly

x-pack/plugin/ent-search/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/xpack/application/FullClusterRestartIT.java

@@ -12,7 +12,6 @@
 import org.elasticsearch.client.Request;
 import org.elasticsearch.client.Response;
 import org.elasticsearch.client.ResponseException;
-import org.elasticsearch.core.UpdateForV9;
 import org.elasticsearch.test.cluster.ElasticsearchCluster;
 import org.elasticsearch.test.cluster.local.distribution.DistributionType;
 import org.elasticsearch.test.rest.ObjectPath;