fix build

Author: TaiJuWu

storage/src/test/java/org/apache/kafka/storage/internals/log/UnifiedLogTest.java

@@ -20,7 +20,6 @@
 import org.apache.kafka.common.compress.Compression;
 import org.apache.kafka.common.errors.KafkaStorageException;
 import org.apache.kafka.common.record.ControlRecordType;
-import org.apache.kafka.common.record.EndTransactionMarker;
 import org.apache.kafka.common.record.MemoryRecords;
 import org.apache.kafka.common.record.RecordBatch;
 import org.apache.kafka.common.record.SimpleRecord;