Delete old duckdb index files

default/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f59a7c945bf5175ec8ef332bcc064857acf405715343681f74120fc125d16705
-size 1060864

default/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a281ad42dc4af4133634797644df0d3f9844730652f12c6cbe12f4437bc36e81
-size 1323008

default/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7eab6e13252fb0abcf29c8a264d3fb5b4e1458b7acf414562a1e9ff7c266dd4f
-size 1323008

original-splits/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:67380cf52f9775a06db11111e9c97a34a10a1692e064c4cc450e65bdfc3faf2e
-size 1060864

original-splits/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9c9e33742c3c24211e6e051685243e7499d5f95c612301943614bd10b179eed9
-size 2109440

original-splits/val/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:05de97688a1a00a5155ec384665112d934bd0c4dd16e61510688ff67027567b3
-size 1323008

original-splits/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7d63419a346902795c1566809459ba3b6bc6d21ea5215c4625271540bef7809e
-size 1323008