MAINT: Remove accidentally committed file

[david-cortes-intel]

Description

Add a comprehensive description of proposed changes

List associated issue number(s) if exist(s): #6 (for example)

Documentation PR (if needed): #1340 (for example)

Benchmarks PR (if needed): IntelPython/scikit-learn_bench#155 (for example)

---

This PR removes a reference notebook that was accidentally committed in a previous PR.

PR completeness and readability

• Git commit message contains an appropriate signed-off-by string (see CONTRIBUTING.md for details).
• I have added a respective label(s) to PR if I have a permission for that.
• I have resolved any merge conflicts that might occur with the base branch.

Testing

Not applicable.

Performance

Not applicable.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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github	71.00% <ø> (ø)

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see 54 files with indirect coverage changes