Delete old duckdb index files

stackmathqa100k/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:effd08fe725572bdd6fa9a87c531fbeb0c58fe33b161aa9d7efec56079fd7175
-size 301477888

stackmathqa1600k/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a7771ca61971325a1f336bcc94718614eb21f1fed50f514bdcc25d8351e74717
-size 3875549184

stackmathqa200k/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:07f765db94426c9ca563ad719b6f268501f595ccb29781f87b452f4b1b4b4f5b
-size 498085888

stackmathqa400k/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:fa1b5d17bfaec701e2b26bbe3d15de346d9e38aa951ebcfa861c919caf1adb7a
-size 842543104

stackmathqa800k/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0560d0b76142a119798f800c0bd1c2bdc325d3ffb0d5a62d72ff53375f8ca8f0
-size 1552953344

stackmathqafull-1q1a/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:59bfc17a38de2cb3c3f1407edcdb6518558c5b5a965dba9a82982c3e8382c7d0
-size 7356559360

stackmathqafull-qalist/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3486fd4cad485de8a1ffa28b5ec4d5951b415d5a95def48d28a5dc2d9191bcfa
-size 6139162624