Suppress xformers impl_abstract FutureWarning at import

model.py

@@ -1,4 +1,14 @@
-# From https://github.com/facebookresearch/llama/blob/main/llama/model.py
+import warnings
+
+# xformers 0.0.27 still calls `torch.library.impl_abstract`, which torch
+# deprecated in favor of `register_fake`. Suppress the FutureWarning before
+# importing xformers so anyone doing `AutoModel.from_pretrained(...)` gets
+# clean output. xformers 0.0.28+ fixed it; this filter is a no-op there.
+warnings.filterwarnings(
+    "ignore",
+    message=r"`torch\.library\.impl_abstract` was renamed.*",
+    category=FutureWarning,
+)
 
 import torch
 from torch import nn