turn off TF warnings

[miguelgfierro]

Description

Related Issues

fixes #1256

Checklist:

• I have followed the contribution guidelines and code style for this project.
• I have added tests covering my contributions.
• I have updated the documentation accordingly.
• This PR is being made to staging branch and not to master branch.

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[wutaomsft]

Wonder if we want to clean up output of the notebook before checking in? Asking as a general question.

[miguelgfierro]

Wonder if we want to clean up output of the notebook before checking in? Asking as a general question.

Not sure if you refer to the warning outputs of Tensorflow, in that case, they should be cleaned with the latest changes. If you refer to completely erase the output of all the notebooks, we had a discussion about that matter some months ago, we decided to leave the outputs because it helped the user understand each notebook and algorithm. We can have the discussion again if you consider it