fix rebase

Author: orenccl

iceberg/iceberg-rest-server/src/test/java/org/apache/gravitino/iceberg/integration/test/IcebergRESTOSSIT.java

@@ -22,7 +22,6 @@
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Optional;
 import org.apache.gravitino.catalog.lakehouse.iceberg.IcebergConstants;
 import org.apache.gravitino.credential.CredentialConstants;
 import org.apache.gravitino.iceberg.common.IcebergConfig;