Delete old duckdb index files

meaning/dev/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d0a436326755db78f44aec3aa34e5316ec98605cd03b040cbb50ac3e50084b8c
-size 1060864

meaning/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:bdbd82825954f353ffa52200d94a11cc65533b6d1db7b44a4303afc0e4df522c
-size 1060864

meaning/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:cc1d004eefb1a924be4d60cf5a013b98a9643c75a61eeedb1a1070c5e576ca56
-size 1060864

meaning_holdout_identical/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:df71f35d48a6effff58d64636f9f702079f6197cac79ead6a5a6865556e91b97
-size 1060864

meaning_holdout_unrelated/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:bd794999abc70fb12d8e464c14435a4fb720f4a4462d6470bf7d9236c96c7b0e
-size 1323008

meaning_with_data_augmentation/dev/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f1c351e255d8ad67bed7e86db485f8ae99bcc6aa476475b17640e9534db3e006
-size 1060864

meaning_with_data_augmentation/test/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3c5cba876ec168ff2cdb8c06a1069da9651ec77d89cc129d04329153c63246e5
-size 1847296

meaning_with_data_augmentation/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:1bf1b750037923431df0ea1ecb8e7cb9e7deaa0bddcc5bb8d63f8ad3084cdfdc
-size 2109440