[CI] Auto commit changes from spotless

Author: elasticsearchmachine

server/src/test/java/org/elasticsearch/action/bulk/BulkResponseTests.java

@@ -16,7 +16,6 @@
 import org.elasticsearch.action.delete.DeleteResponseTests;
 import org.elasticsearch.action.index.IndexResponseTests;
 import org.elasticsearch.action.update.UpdateResponseTests;
-import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.xcontent.ChunkedToXContent;
 import org.elasticsearch.core.Tuple;