README: drop train_data/ from layout (filtered-only consistency)

README.md

@@ -83,11 +83,6 @@ unpaired/                   OAS unpaired, filtered (heavy ngl≥3 OR light ngl
   test/
     heavy/                  chunked
     light/                  chunked
-
-train_data/                 ANARCI-relabeled intermediates (pre-chunking)
-  paired_anarci_relabeled.parquet
-  unpaired_anarci_relabeled.parquet
-  unpaired_val.parquet
 ```
 
 ## Filter rationale