Delete old duckdb index files

bionlp_shared_task_2009_bigbio_kb/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:09bede832fd661e0ede850cffb7f0c5e5363633f26483ea5f1a63424cfc3059b
-size 1323008

bionlp_shared_task_2009_bigbio_kb/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b3cb86689bb091826e9ba3e3848ec6dd20402cf7de5a62c278c21ec7e887afb4
-size 4206592

bionlp_shared_task_2009_bigbio_kb/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4547747b181e86989af3b668763b51886d3606265fa1bc1aa1eddea492efef50
-size 1323008

bionlp_shared_task_2009_source/test/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:6ef80dccc04553cc4f12ec3474108c133b47deec19d08478dcb977c634e4a194
-size 1323008

bionlp_shared_task_2009_source/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:2680c121d73b8827b527649b1c31178c8350edbd6e52218d57563369ad061bec
-size 4730880

bionlp_shared_task_2009_source/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9c0c59bbcf871fb64189c6e68406d8104a7f23d10b8981a37c62f54cc15ca939
-size 1323008