Delete old duckdb index files

KhalfounMehdi--dermatology_anomaly_detection/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:8f08c8d271c7f2cc4b29fcaa1a5000b01cddf2dd4c65f7dacc8eee245d8124cb
-size 53751808

default/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3651754611e40a73fac892042f5ce33e89336648815590496099df4885f6081d
-size 120336384