Delete old duckdb index files

GIZ--sector_data/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:29dc4a6f4e05546305d0e819b6434371b6e5cb09116c16abf4d61c73ee7659c5
-size 9711616

default/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:5ce0dc45c4af33e3f5be10d98bec715f7572aef10fcf218b448fdd04cd944fde
-size 1323008

default/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3da7dcf2e8acad62ceb82f13d472a9f41390159de23ea0a6715d4765a06d6736
-size 7352320

default/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:23dc03a0b70b0341431090627bb7e69873f8054003c9b4146546d1bf78638257
-size 7352320