diff --git a/animatediff/sampler.py b/animatediff/sampler.py
index 26d9fa7..9d9f1e4 100644
--- a/animatediff/sampler.py
+++ b/animatediff/sampler.py
@@ -54,7 +54,6 @@ def groupnorm_mm_factory(video_length: int):
 
 
 orig_forward_timestep_embed = openaimodel.forward_timestep_embed
-orig_maximum_batch_area = model_management.maximum_batch_area
 orig_groupnorm_forward = torch.nn.GroupNorm.forward