Delete old duckdb index files

pairs/ref/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9f239dfd562eabb821e74cbb3d94e901dc87c56606a26bca85670e05da2f7546
-size 1585152

pairs/sup/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:cd5d5b27b07b9ec49e3cf3208484095c0c5dd4734420438321dbeb6ec1f1b9e0
-size 1323008

pairs/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3b8b908413e3d384b1d1c603aa613fdf5412ad0fc67afb9f82aa5fcb0a68174d
-size 1585152

pairs/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:93c134fbf097f52b32d932153321aa7683a13cd595fe0fe80fb2c30c709a3ae8
-size 1323008

pairs/valid/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4bcc93159851fa0400043191a71e9fb28f35a3f237bae635e1064027093203ba
-size 1323008

source/ent_ids/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:30d31d2d46b3c3a3e9187946c3d781f20fe3bc4276015826df662eaec626fc34
-size 7876608

source/rel_triples_id/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:38d2f8f160010339ec784841f5d25cbce847a835a11aa2fd4d7a1e8ac14dc28b
-size 5255168

target/ent_ids/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4b0822fed5ca973ff64781b4a2594dba1d3a2ec82ceba462c56f1280340b430b
-size 6041600

target/rel_triples_id/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:13e6804fa811e775ae1d34021b2f11e1bff45aa92bc5f874957431154b46d22d
-size 5779456