Fix for reopening of #4 (not same issue as before).

Added obsolete_pdbs_file_path flag in the training script.

train_openfold.py

@@ -266,6 +266,11 @@ if __name__ == "__main__":
         "--distillation_mapping_path", type=str, default=None,
         help="""See --train_mapping_path"""
     )
+    parser.add_argument(
+        "--obsolete_pdbs_file_path", type=str, default=None,
+        help="""Path to obsolete.dat file containing list of obsolete PDBs and 
+             their replacements."""
+    )
     parser.add_argument(
         "--template_release_dates_cache_path", type=str, default=None,
         help="""Output of scripts/generate_mmcif_cache.py run on template mmCIF