Delete old duckdb index files

default/all_docs/index.duckdb

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-oid sha256:0535585d6e363d829f6873e07e4f5bc3d57326e26f57ccf7810f599e8869f3dc
-size 18886656

default/all_docs_eval/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:93cfd2eafff92b35750d2923740205e8156720943440a604173bff8abb5a16e9
-size 18624512

default/eval_ic_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:e2308795876dc139c3f4425cc2061543054fed8016492ed64596791aa2b094c3
-size 11284480

default/eval_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:6c0fe53bcd046b712216c09096f333b3107b4a97aa5e435829864f854beacab5
-size 2895872

default/eval_recite_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:ac70b31fcd455111dba467556f3b70bb631db878a796406e81d58926d91f86df
-size 11022336

default/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:0d16f5f0306d2986672a93598f906c7058b657ba61ef2a11ffe5ef25a6b780b9
-size 15216640

default/train_ic_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:d3ae8f408366931a1d9d7b5168a525d472b1b6a914c095f194b74b84e2a1d657
-size 11808768

default/train_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:d54f573ae5413f7d69e75661b0635fe68b6a1afd24e6b08dc5dfb194ef488407
-size 2895872

default/train_recite_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:c0431ea9143fdb126a54d1f45674eab970a312003062f0d9b96a3d839e741149
-size 12070912

default/validation/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:c992ae3328a77e05a1d2fda35721d128951843b5299a816cf1881753c02a34af
-size 14168064