Delete old duckdb index files

default/partial-test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:aee15b7e644b355199443d6bdbd90cadc396e74a0ccec3b527305037c8be6079
-size 7693938688

default/partial-train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:8916460d08186fcf91077394cd80b4c10c76374e91ffcd62057bffa7eb99b804
-size 7414493184

default/partial-validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:34d10b5326ec8b5a9607b3172297ee21498bc498ac61d3e52fb4ac339f9926b0
-size 7443066880

default/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:094a7cb7309db1f8a4079ad6bd19c68ec3331c2b386b15393d22eb5d2b9a189d
-size 2542546944

default/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7a66f878ea4bdd1d005cb4470bfe8fa14eb8a2d6a6a1b92b52e84ce480efbd99
-size 1533816832

default/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b4e9db7e6e8abd44f81056598914c7437f7f3d2fcc2da0aa2ff919d918794029
-size 2386571264