Delete old duckdb index files

v2.2/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:684063d6c71529c48518cbc36810fa46de1afc5a9b90c7ed898ea76d78abba35
-size 14954496

v2.2/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:07f47a7d1dda85353af65a395fd3a5f78d2dacf50931ca3666f2985879f929e7
-size 100413440

v2.2/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:058cd173ed60858e37b8ad9968fc28b5ca17d5ed564b3c3ba69bb4c6092fd536
-size 14954496

v2.2_active_only/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e08c9e198ae82408f43bed0af6a92457166771530ef653c71f48f4a2fdc406ba
-size 6828032

v2.2_active_only/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7022b1267c05185cfeada7519abc05e5ad608883c5d41703487b42f5a3781be8
-size 48771072

v2.2_active_only/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b25f8b14e039ed722515eb10fb9e6cb1864eb3e5c66469605f0b97d45dcd68cc
-size 6303744