Fixing compilation

Author: Alexey Kudinkin

hudi-utilities/src/main/java/org/apache/hudi/utilities/deltastreamer/DeltaSync.java

@@ -101,7 +101,6 @@
 import org.apache.hudi.utilities.sources.InputBatch;
 import org.apache.hudi.utilities.sources.helpers.KafkaOffsetGen;
 import org.apache.hudi.utilities.transform.Transformer;
-import org.apache.kafka.common.utils.CloseableIterator;
 import org.apache.log4j.LogManager;
 import org.apache.log4j.Logger;
 import org.apache.spark.api.java.JavaRDD;