[KED-2013] Delete `hello_kedro.py` from `kedro-examples`

[lorenabalan]

Description

Part of the clean-up of the repo

Development notes

Checklist

• [ ] Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• [ ] Assigned myself to the PR
• [ ] Added tests to cover my changes

Notice

• [x] I acknowledge and agree that, by checking this box and clicking “Submit Pull Request”:

• I submit this contribution under the Apache 2.0 license and represent that I am entitled to do so on behalf of myself, my employer, or relevant third parties, as applicable.

• I certify that (a) this contribution is my original creation and / or (b) to the extent it is not my original creation, I am authorised to submit this contribution on behalf of the original creator(s) or their licensees.

• I certify that the use of this contribution as authorised by the Apache 2.0 license does not violate the intellectual property rights of anyone else.

[lorenabalan]

You may need to raise one more PR, to address the mention of this code here: https://kedro.readthedocs.io/en/stable/02_get_started/03_hello_kedro.html

Good catch! Will do.