Bug Fix: Remove explicit message argument in deprecate (#2421)

Remove explicit message argument

src/diffusers/models/cross_attention.py

@@ -260,7 +260,7 @@ class CrossAttention(nn.Module):
             deprecate(
                 "batch_size=None",
                 "0.0.15",
-                message=(
+                (
                     "Not passing the `batch_size` parameter to `prepare_attention_mask` can lead to incorrect"
                     " attention mask preparation and is deprecated behavior. Please make sure to pass `batch_size` to"
                     " `prepare_attention_mask` when preparing the attention_mask."