Delete old duckdb index files

abstractive/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:61b9187bd0ae5f3b92937d52f06cc035c483508dc9ea2dbd1cd04e87db72b1ea
-size 2109440

abstractive/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:831599a86f2fc5a3ed0894d8dac8cc3842ad4b863dc2fd0a0faeeac40ab107ca
-size 9711616

abstractive/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:922c39308e4a3edbeec2a51a1fa15494b0c3743d86eef893588863e6bd439ec9
-size 1585152

extractive/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:56988668254942d72860dde653d41a1785765ea247b278644d7e7196d68767c6
-size 2109440

extractive/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b8ac5044c5c15b3dda1b2c889a0a44b6c32d0858c126999c8e3b347b855aaea6
-size 9711616

extractive/validation/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a3006f69eeed87e43b2ab73a63c6bf6c08db7214c7b9e4d43eb98380626605b9
-size 1847296