PR #1365 broke importing diffusers

Describe the bug

When I try to import diffusers, I get the error below. The file causing the error is from PR #1365, which was merged today.

Reproduction

%cd /content
!git clone -b main  https://github.com/huggingface/diffusers.git
import sys
sys.path.insert(0,'/content/diffusers/src/')
import diffusers

Logs

ImportError                               Traceback (most recent call last)
<ipython-input-2-3ef39c283978> in <module>
     20 import sys
     21 sys.path.insert(0,'/content/diffusers/src/')
---> 22 import diffusers
     23 diffusers.__file__
     24 

5 frames
/content/diffusers/src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_image_variation.py in <module>
     20 import PIL
     21 from diffusers.utils import is_accelerate_available
---> 22 from transformers import CLIPFeatureExtractor, CLIPVisionModelWithProjection
     23 
     24 from ...models import AutoencoderKL, UNet2DConditionModel

ImportError: cannot import name 'CLIPVisionModelWithProjection' from 'transformers' (/usr/local/lib/python3.7/dist-packages/transformers/__init__.py)

System Info

On a colab notebook.

[anton-l]

Fixed in a patch release 0.8.1: https://github.com/huggingface/diffusers/releases/tag/v0.8.1 ⚠️ Please upgrade with pip install --upgrade diffusers or pip install diffusers==0.8.1

[OrionFive]

I suppose pipeline_stable_diffusion_image_variation.py should fail gracefully if an unreleased model it is depending on is not available.