Layoutlm tf
Author: atahmasb
Pull request: yes

# What does this PR do?

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This PR adds TF version of LayoutLM for issue [(10312)](https://github.com/huggingface/transformers/issues/10312)


## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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      Pull Request section?
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- [X] Did you write any new necessary tests?


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Models:

- albert, bert, xlm: @LysandreJik
- blenderbot, bart, marian, pegasus, encoderdecoder,  t5: @patrickvonplaten, @patil-suraj
- longformer, reformer, transfoxl, xlnet: @patrickvonplaten
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- tensorflow: @jplu

Library:

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- text generation: @patrickvonplaten
- tokenizers: @n1t0, @LysandreJik
- trainer: @sgugger
- pipelines: @LysandreJik

Documentation: @sgugger

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- nlp datasets: [different repo](https://github.com/huggingface/nlp)
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Comments:
Oh, no! Did you have some issues with a rebase? Can we help in any way?

> Oh, no! Did you have some issues with a rebase? Can we help in any way?

I do! For some reason when I rebased I was not able to push my changes. It was rejected because my branch was diverged too much form the remote. Then my option was to pull all changes which results in many file changes that are not mine. 

Ah! Would you like me to try and retrieve your commits and push them on a new branch of your repository? I can take care of the rebasing as well.

> Ah! Would you like me to try and retrieve your commits and push them on a new branch of your repository? I can take care of the rebasing as well.

that would be great, ty.

I'm getting permission denied on your fork, can you invite me to it so I can push the new branch? Thanks!

> I'm getting permission denied on your fork, can you invite me to it so I can push the new branch? Thanks!

done. Let me know if there was any access issues and Thanks again for helping me with this

You can find the branch [here](https://github.com/atahmasb/transformers/tree/layout-lm-tf-2)! I've rebased it for you, and fixed the code quality issues. The `TFLayoutLMForSequenceClassification` class was in double so I removed one of them. Let me know if this shouldn't have been removed!

> You can find the branch [here](https://github.com/atahmasb/transformers/tree/layout-lm-tf-2)! I've rebased it for you, and fixed the code quality issues. The `TFLayoutLMForSequenceClassification` class was in double so I removed one of them. Let me know if this shouldn't have been removed!

Thanks! You're awesome!