Delete old duckdb index files

scifact_claims_source/test/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:ca05052b4847441928a005c5353ff8dc8f93b70b09df21ca0f910517fe34df53
-size 1060864

scifact_claims_source/train/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:39cf15714c4c073c9583c488f63eb45689cafc346e630382707d5bcd030f29ee
-size 1060864

scifact_claims_source/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:30b6de25cee78b5e48306da796f88c8c09573f37561f60cb9cb0782ce6ee22d8
-size 1060864

scifact_corpus_source/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:80918a895a4e84e5e60c932e6832889afac6d93acffbf1d571e99aff517b9367
-size 9973760

scifact_labelprediction_bigbio_pairs/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:dd40ed79739c9cc6c975ea6aa9e1e0917560d84375e3a5c3212ce9bcf5d03376
-size 3420160

scifact_labelprediction_bigbio_pairs/validation/index.duckdb

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-version https://git-lfs.github.com/spec/v1
-oid sha256:6080af05872c45a898076d472e18cd292572a5db356e2bba799141fcd2babc94
-size 1585152

scifact_rationale_bigbio_pairs/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ca0c7b4ecafce310859d0a6fd7659d8f1456626d5d71188e4093bcbf4e0d3264
-size 3944448

scifact_rationale_bigbio_pairs/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:c2a6ac605d5a88b42473b410bc3fd934a24c3af1e3009eb19cfccfd8582d8b4a
-size 1585152