Delete old duckdb index files

kbp37/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:5174491adbb047b8ea25751ac695941f9e4fad33861ecf07c26547b9fd052641
-size 1847296

kbp37/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:16057a621b6732f0f196ce6256a0705b87c664eec6a8f55bf3b68a3f073326ac
-size 7090176

kbp37/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4caff6499971e37f8e0a029eba88ce8bbf819fd427ca3a3e8482614554d0c61c
-size 1323008

kbp37_formatted/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7d7b21f32f7dc3d79b9369b155927c2630435c0951ac35e9b063e4616852deb3
-size 1585152

kbp37_formatted/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a5ccd805bfe1e7226cf1cd22f3b810d53ce3c6a76c44dbab532837788fcd1877
-size 6828032

kbp37_formatted/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:696a69b376f907799f0c2b4fab67284548a83dd6b86992fc663a8e6e44f92593
-size 1585152