fix warning (#2105)

src/accelerate/big_modeling.py

@@ -404,21 +404,17 @@ def dispatch_model(
         )
 
         # warn if there is any params on the meta device
-        if len(offload) > 0:
-            offloaded_devices_str = " and ".join(
-                [device for device in set(device_map.values()) if device in ("cpu", "disk")]
-            )
+        offloaded_devices_str = " and ".join(
+            [device for device in set(device_map.values()) if device in ("cpu", "disk")]
+        )
+        if len(offloaded_devices_str) > 0:
             logging.warning(
                 f"Some parameters are on the meta device device because they were offloaded to the {offloaded_devices_str}."
             )
 
         # Attaching the hook may break tied weights, so we retie them
         retie_parameters(model, tied_params)
 
-        # warn if there is any params on the meta device
-        if len(offload) > 0:
-            logging.warn("Some parameters are on the meta device device because they were offloaded to the cpu/disk.")
-
         # add warning to cuda and to method
         def add_warning(fn, model):
             @wraps(fn)