Delete old duckdb index files

discovery/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:1413ca4f6ceb6ff778aaf8b75e559f555d020486a02eed05c4fe2848e736d237
-size 22818816

discovery/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e43b873bdb3af626d44af142f9e8cfbd7f611b5da4d87402d71d5b85640095f3
-size 388247552

discovery/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:20bee21604ebc618f3fbce776b2ceb2adb2734ea2b803364a7b0e13b30f5d7ae
-size 22818816

discoverysmall/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:fb66782331c4bf567a4ad6bcdb4cb11197c3efae43090fe56b1db927b283a5d2
-size 1060864

discoverysmall/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4697f6be38449fcaa4e767c6d7ecae8cb1f285a573c078af3c70cb19cf9c67ae
-size 5255168

discoverysmall/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:14998db778d7e4e9ce0cf02d78114aae6b56af49923d2da53167b43f77e4e5f1
-size 1060864