Delete old duckdb index files

default/challenge_train_10_percent/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e4ba25d9a5262d6cf9419dfc7e525fe9064238503b0fb755995bd8da7fb0bbaa
-size 1060864

default/challenge_train_1_percent/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:07f82765f0b09b00bad102444f604124eab53c0d620fceecb82ba6ea5652099e
-size 1060864

default/challenge_train_20_percent/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b2aa1bd98c932b7a4290374a1f801ff455efa994f643c6a1d9d0a5f95e155286
-size 1323008

default/challenge_train_2_percent/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:79c09a5861a12e365377163589ab21140b9ca685a344830a585ba442dc4ea778
-size 1060864

default/challenge_train_5_percent/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:087764c01d691e579a253a6e07dbdae53f77d474399d63f8f3b56be5cec7f302
-size 1060864

default/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ae0cd927e75d8b24cc5eecf0fb5d7df396348c921e05695855bbada2a96e9f41
-size 1323008

default/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:45ff7f29daf7afed709f6a7fe8ce6be7760b310011c09570968263bf8b0109f4
-size 3158016

default/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4bc9ae48bb107578d51a1753da32c73afc6be6d5c993f9a3846dad7e41505a91
-size 1060864