fix symlink

Author: suchenzang

metaseq/checkpoint_utils.py

@@ -101,7 +101,7 @@ def save_checkpoint(
             # Create symlink between identical checkpoints (differing in naming for epoch/update/last).
             for other_checkpoint in checkpoints[1:]:
                 assert PathManager.symlink(
-                    checkpoints[0], other_checkpoint, overwrite=True
+                    checkpoints[0], other_checkpoint
                 ), f"Failed to symlink {checkpoints[0]} to {other_checkpoint}"
 
         write_timer.stop()