Delete old duckdb index files

default/partial-train_1/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:178e033caa899cb5a8a6cb32910713675a4aefbc91e703996d5e73b9c0c7e744
-size 4941950976

default/partial-train_2/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3c481a206ba35748fd9f9df65eb183b0b2589fd799aa9812613872b849377686
-size 5047595008

default/partial-train_3/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3f787ae0c3786abbf2655867c07fe78cc2c359d55b7692917601296fa9f88f47
-size 5213532160

default/partial-train_4/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3e220737a9167bd522dd8d7498c626e62134adb27c7b2572eb763a540303b66e
-size 5150093312

default/partial-train_5/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d952186b03a4fd38c58a57cebd3af4d366d1cad9ab9351f9a57a024f05c3aa94
-size 5146685440

default/partial-validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7c0b9a5172c9345aaa1548fa1a3e05ba99d896e2483069e540bbb7948818c8d4
-size 2405445632