Delete old duckdb index files

all/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ee25e6e9b4bc07d8527e5db8503fd0f466caa364892e02ff83d5b9655edba922
-size 3944448

v1/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ce38c3ffa0e1e7c418a0c60953be83894a604dd0aa7bd07422a3444510c9884a
-size 2109440

v1/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:8adc7ff22f92f0550aaf09f9e6fcf8ed52a0b06ad4363974bdad97a7651c8ff4
-size 2109440

v2/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ae3882a1108c254e5cfe47e77d69bb90ec1dcd53ae4c954024bf16828e455690
-size 1585152

v2/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:20bff5438b15ad1c331c9d5a64a1927fbb812b96e34e53282e5944e212cc63cf
-size 1847296