diff --git a/comfy/ldm/modules/diffusionmodules/openaimodel.py b/comfy/ldm/modules/diffusionmodules/openaimodel.py
index 057dd16b..cb0a7983 100644
--- a/comfy/ldm/modules/diffusionmodules/openaimodel.py
+++ b/comfy/ldm/modules/diffusionmodules/openaimodel.py
@@ -437,9 +437,6 @@ class UNetModel(nn.Module):
         operations=ops,
     ):
         super().__init__()
-        assert use_spatial_transformer == True, "use_spatial_transformer has to be true"
-        if use_spatial_transformer:
-            assert context_dim is not None, 'Fool!! You forgot to include the dimension of your cross-attention conditioning...'
 
         if context_dim is not None:
             assert use_spatial_transformer, 'Fool!! You forgot to use the spatial transformer for your cross-attention conditioning...'
@@ -456,7 +453,6 @@ class UNetModel(nn.Module):
         if num_head_channels == -1:
             assert num_heads != -1, 'Either num_heads or num_head_channels has to be set'
 
-        self.image_size = image_size
         self.in_channels = in_channels
         self.model_channels = model_channels
         self.out_channels = out_channels