Update seed.py

Author: amorehead

src/lightning/fabric/utilities/seed.py

@@ -92,11 +92,7 @@ def pl_worker_init_function(worker_id: int, rank: Optional[int] = None) -> None:
     """
     # implementation notes: https://github.com/pytorch/pytorch/issues/5059#issuecomment-817392562
     global_rank = rank if rank is not None else rank_zero_only.rank
-    env_seed = os.environ.get("PL_GLOBAL_SEED", None)
-    if env_seed is None:
-        env_seed = "0"
-        rank_zero_warn(f"No seed found, worker seed set to {env_seed}")
-    process_seed = int(env_seed)
+    process_seed = torch.initial_seed()
     # back out the base seed so we can use all the bits
     base_seed = process_seed - worker_id
     log.debug(