Delete old duckdb index files

With-augmentation/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:645954018bfd449d002d89a36c9361ed2dbfbb01a6020174bbd8c08d728d4afb
-size 2371584

With-augmentation/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d57db91a048720706b97af627ed76408c3a77babbde2e90f24938167eb9d625d
-size 584593408

With-augmentation/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7f7bef966ff4b5e2e0d395f5409e1b1d23c4c91b778381fd15971a4442befd6e
-size 6041600

Without-augmentation/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:16e66dae15e9cd2b9d0a3f55493e2f7ca36bb9ce31eb09e20b47abbb7e90c20e
-size 7876608

Without-augmentation/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f23a52be3cf0a8486d865c11499239afbaaff7f798047fe8f24159836454cc43
-size 484454400

Without-augmentation/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3ae81cc8f388030b5426279b5ef7cdc137c0dbe31fa48f473bbdc9d0765ac397
-size 25440256