remove the existing code

[t12i-dev]

I want to remove the existing practice content so I can try writing by myself from scratch.

[microsoft-github-policy-service]

@trieungochai please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

@microsoft-github-policy-service agree [company="{your company}"]

Options:

• (default - no company specified) I have sole ownership of intellectual property rights to my Submissions and I am not making Submissions in the course of work for my employer.

@microsoft-github-policy-service agree

• (when company given) I am making Submissions in the course of work for my employer (or my employer has intellectual property rights in my Submissions by contract or applicable law). I have permission from my employer to make Submissions and enter into this Agreement on behalf of my employer. By signing below, the defined term “You” includes me and my employer.

@microsoft-github-policy-service agree company="Microsoft"

Contributor License Agreement

Contribution License Agreement

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[smith-kyle]

I noticed you all aren't using a notebook review tool and wanted to invite you to review this pull request with GitNotebooks: https://gitnotebooks.com/microsoft/AI-For-Beginners/pull/292

It lets you do things like comment on rendered markdown and code cells, so might be an easy win for your PR reviews.

[BethanyJep]

hello @trieungochai kindly accept the policy -> @microsoft-github-policy-service agree