Delete old duckdb index files

default/all_docs/index.duckdb

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-oid sha256:b145348460a0730e3ea4c91e282e7581f9b2b0d9025ebcf098591854b6436b35
-size 18886656

default/all_docs_eval/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:ddedf7cbfe317fdf381c69390d475f12b34dd618b6e61c0f7eae009a2b6dfcf5
-size 18624512

default/eval_ic_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:3e954d70b9318ffe88aea43609026faec7c82fc4fce1d5ade97ecbf56cdc090c
-size 11284480

default/eval_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:59c29707010560f994898eff06365bb92490f6825e7cd61c3adf5cac762314ee
-size 2633728

default/eval_recite_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:e4a456887941c39cbecf5036e1dcf77519ee10c17d3c1c0bef648ff34677f130
-size 11022336

default/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:74c3e644617f4ed267e66640986475c0cab5595dbcaaeba906af21620d69c0ef
-size 18886656

default/train_ic_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:4353cc460b6f615649ec7766c50023e0f0bdc41db14470ce677214639187e3c0
-size 12070912

default/train_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:511a2db41cf668c659ab27eb7628bdfc91fc399ec2462551cc4c6beb43015f5c
-size 2633728

default/train_recite_qa/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:4fa9fccd722f0e9937f10d40fc7b9c5736cc87551294cb05db369dafbf0b0221
-size 11808768

default/validation/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:cc68905092bfef712591be8b81eecd250a10a564328d1d9004b8c41b514c184d
-size 18624512