Delete old duckdb index files

default/partial-test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0947114d36f127a66fc10053a3da392d3c2feaeca06e9980957eee601134285a
-size 688926720

default/partial-validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:861d59fc53f661fac151f71456dd2e4eac3c5932c4b459e889873d01cff6e1d7
-size 688402432