🔧 chore: use modeling_outputs.Transformer2DModelOutput (#8436)

* 🔧 chore: use modeling_outputs.Transformer2DModelOutput

* 🔧 chore: isort

* 🔧

 chore: isort

* style

---------
Co-authored-by: sayakpaul <spsayakpaul@gmail.com>

src/diffusers/models/transformers/dual_transformer_2d.py

@@ -15,7 +15,8 @@ from typing import Optional
 
 from torch import nn
 
-from .transformer_2d import Transformer2DModel, Transformer2DModelOutput
+from ..modeling_outputs import Transformer2DModelOutput
+from .transformer_2d import Transformer2DModel
 
 
 class DualTransformer2DModel(nn.Module):

src/diffusers/pipelines/unidiffuser/modeling_uvit.py

@@ -9,8 +9,8 @@ from ...models import ModelMixin
 from ...models.attention import FeedForward
 from ...models.attention_processor import Attention
 from ...models.embeddings import TimestepEmbedding, Timesteps, get_2d_sincos_pos_embed
+from ...models.modeling_outputs import Transformer2DModelOutput
 from ...models.normalization import AdaLayerNorm
-from ...models.transformers.transformer_2d import Transformer2DModelOutput
 from ...utils import logging