remove unused imports

src/main/java/com/microsoft/azure/kusto/kafka/connect/sink/KustoSinkTask.java

@@ -11,7 +11,6 @@ import com.microsoft.azure.kusto.ingest.IngestionMapping;
 import com.microsoft.azure.kusto.ingest.IngestionProperties;
 import com.microsoft.azure.kusto.ingest.IngestClientFactory;
 import com.microsoft.azure.kusto.ingest.source.CompressionType;
-import org.apache.commons.io.FileUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.kafka.clients.consumer.OffsetAndMetadata;
 import org.apache.kafka.common.TopicPartition;
@@ -27,7 +26,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.testng.util.Strings;
 
-import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;