fix import issues

Author: hongzhi-gao

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/load/util/LoadUtil.java

@@ -24,7 +24,6 @@
 import org.apache.iotdb.commons.exception.DiskSpaceInsufficientException;
 import org.apache.iotdb.commons.utils.RetryUtils;
 import org.apache.iotdb.db.conf.IoTDBDescriptor;
-import org.apache.iotdb.db.exception.DiskSpaceInsufficientException;
 import org.apache.iotdb.db.storageengine.dataregion.modification.ModificationFile;
 import org.apache.iotdb.db.storageengine.dataregion.modification.v1.ModificationFileV1;
 import org.apache.iotdb.db.storageengine.dataregion.tsfile.TsFileResource;