Delete old duckdb index files

all_data/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d18eb9aba3a9436cc9bfb20f2605e440e100c2689b259aed80382d162d6cb21e
-size 48508928

dependency_parsing_jos/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:459dfa95aa7329ae885cd9343e7d6c7fdf8df6f6db766a291712c987d64e3cc1
-size 20721664

dependency_parsing_ud/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a09fd96b2eab7cadf74729461ab1d6cdb465541f5c463e40770dc65b828639f6
-size 13381632

multiword_expressions/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ede7de277bb5b436fa4de2dbe21a26f8d418c51b7a9711321595c8ba174b36cd
-size 22032384

named_entity_recognition/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:be8fa7215514a2f652db917ff201bb8ef8aaa1622b73b0ebbf7bfcb2b9ab24f7
-size 15740928

semantic_role_labeling/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:c4f162c9a78f1a63d10286518032387cc4ac2bd2cb01f06815caee18e5f64ff4
-size 11546624