Post-deploy job to delete old duckdb index files
Fix https://github.com/huggingface/datasets-server/issues/2520 and last part of https://github.com/huggingface/datasets-server/issues/1914
I propose a post-deploy execution job to remove old duckdb index files from **refs/convert/parquet branch**.
This script could be removed once all old index files have been removed.

Post-deploy job to delete old duckdb index files: Fix https://github.com/huggingface/datasets-server/issues/2520 and last part of https://github.com/huggingface/datasets-server/issues/1914
I propose a post-deploy execution job to remove old duckdb index files from **refs/convert/parquet branch**.
This script could be removed once all old index files have been removed.
