style: remove unneeded commented-out code

Author: sdd

crates/iceberg/src/lib.rs

@@ -82,7 +82,6 @@ pub mod transform;
 mod runtime;
 
 pub mod arrow;
-// pub(crate) mod delete_file_index;
 pub(crate) mod delete_file_index;
 mod utils;
 pub mod writer;