ImportError: cannot import name 'TrOCRProcessor'
## Environment info

- `transformers` version: 4.11.3
- Platform: Linux-5.3.0-51-generic-x86_64-with-Ubuntu-18.04-bionic
- Python version: 3.6.9
- PyTorch version (GPU?): 1.7.0+cu101 (True)
- Tensorflow version (GPU?): 2.3.0 (True)
- Flax version (CPU?/GPU?/TPU?): not installed (NA)
- Jax version: not installed
- JaxLib version: not installed
- Using GPU in script?: No
- Using distributed or parallel set-up in script?: No


### Who can help
@LysandreJik please help me out reaching the correct contributor. Tagging @NielsRogge since it is related to vision.
## Information

Model I am using: TrOCR

The problem arises when using:
* [x] the official example scripts: (give details below)
I am trying to run the code sample given on the HuggingFace website [here](https://huggingface.co/microsoft/trocr-base-printed#how-to-use).

The tasks I am working on is:
* [x] my own task or dataset: (give details below)
OCR on black and white images with blurry text. 

## To reproduce

Steps to reproduce the behavior:

1. Install the latest version of `transformers`
2. Run the code snippet provided [here](https://huggingface.co/microsoft/trocr-base-printed#how-to-use).

You should get the following error:
```
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-13a8ac45c2a8> in <module>
----> 1 from transformers import TrOCRProcessor, VisionEncoderDecoderModel
      2 from PIL import Image
      3 import requests

ImportError: cannot import name 'TrOCRProcessor'
```

## Expected behavior

I should be able to run the code example [here](https://huggingface.co/microsoft/trocr-base-printed#how-to-use) without getting any import errors.

Thanks for your interest in TrOCR! For now, you should install Transformers from master: 

`pip install git+https://github.com/huggingface/transformers.git`<|||||>This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/master/CONTRIBUTING.md) are likely to be ignored.