Delete old duckdb index files

default/dev_matched/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ae687a1f761bf79eeaf7ae262a7af07c1693d4f445fd9bb83e10b3e2359df8db
-size 2895872

default/dev_mismatched/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0dd33c32e50f18a5539666084dd9a054bd178daa7445a64be347eeee2c14d1d0
-size 3158016

default/test_matched/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d468a0596a40d1dcf0024ef55b3e0417b022d5e6ac4ac9df53d59365165f0b26
-size 2633728

default/test_mismatched/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:413e6e285d9171a0d55284bc4589adbfabc9c69220a36e5433608da84876cd97
-size 2633728

default/train/index.duckdb

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0df5e96a6c76121c920bb6454efa096dc680aa8bbed7f6a037bc89a7f3ae2fc6
-size 85471232