Delete old duckdb index files

A/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:84334a3499c0f51cd0ffdef4bf9f72ca645e77901a600e476792fb94546b6fcf
-size 1060864

B/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:1616cf5184958c855236a11bb4e588808063094181831166a9372f479fbab7ee
-size 1060864

C/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:d25ab1c42ecd947f411aa3814e7fd7fe1e3d6b4d9b021e75e0d25e52720f66b2
-size 1060864

D/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:ace79d175b1ab4d8662ee44ed0e3c2991cc5d47963acaae60738228d66160db4
-size 1060864

E/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:8d058899361b74081f610ef8fbea7a0ea7a5c8861fb3183e7ce2a546840cb63d
-size 1060864

F/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:3a9da8368749763ae718f9f1d0d0f18d65d5eec3f7f0355dbf4d122a6dd7cb44
-size 1060864

G/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:3a6632f0bfe17595747b61e56ff316f356610e7f8ef9b089d33d451d69436338
-size 1060864

H/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:dd986e2c578d1c2ef48f88f3834782c92d5d50c3dc515798447679ca2b9dbc54
-size 1060864

I/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:8af2c8088f342ba9f2cc8a6d097f1413d8972f9ff50d25bcdf98f50712a95fc2
-size 1060864

J/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:060dd23fc2374a5d5955346b38bb048e109f03bf1e1df0326c26345e49706713
-size 1060864

K/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:4cd94f3120229c17f428221edbd26eda50e3ece7db8ff179835bedddcf7d3235
-size 1060864

L/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:68393a18f99fc322398a88f363738fb2be19355bbb8ef115525f56af151c1697
-size 1060864

M/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:188a5f21274261e9ca5ff1717cb52609632b0ba2512979c7a719012a37de5e21
-size 1060864

N/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:c14a0142648acdbe53e53dbe0acfddce3abf11bf014c7184b0fefccfdae51193
-size 1060864

O/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:fa30b5d05998f747e7ea1d453a884a74062c12276d4545aff69868b8375f284f
-size 1060864

P/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:7e5ddac912317e6859546676927e61f1916bf30a4bc9cba4dab63be1ab40b27f
-size 1060864

Q/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:b3c0997fb9536658082592db0bf347dedebbaebaf1e46d65147ee4a1f21552c4
-size 1060864

R/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:1f642f9bd45e108456d1f4de161c86250947eb643775c18830956c9d55e8a715
-size 1060864

S/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:f6f47b274499f8cf1ae992eec4dcc8dc9a24cd21388ea2371c81c3108ed4d1ae
-size 1060864

T/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:0c7819499e04a06d14e25706a1bcf1405c90a2c2481a2d8221c065d86405a329
-size 1060864

U/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:65d43ccfe4824321e0fc346f2d0f5a1904fe8f24b67b73dc157f60d0b3e03742
-size 1060864

V/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:de24024e26737961dff2287ee8c600d1fe9bc54e056659c0aef6e9652e79e77b
-size 1060864

W/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:b07962bdcf7c8fd72da41beb8cdbf7221641846febada1717e1813aeeae04cd5
-size 1060864

X/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:e798877bf5c2b3eb6eb506939780b39ef198e8d47e094d408de85b54f4c72b07
-size 1060864

Y/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:b3ebc068e97713aefa8d2dabf9bba8fcd77e6bf92f8d98d34eba1920782a8d49
-size 1060864

Z/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:4b6ff672ea69676b67e4c8e021b3ae142ea7112dad253eb93cc3dbb9cdba2e5e
-size 1060864

letter/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:1745e3f3b7a495404ac3b65ef0d29e01546039d9cfacae791e0a9b5e29604e66
-size 1060864