docs: remove unused suppress/anchor lines from NEW_RULES

[PatrickSteil]

Summary:

This PR removes leftover lines from the documentation that caused formatting issues:

• <!--suppress ALL -->: IDE-specific directive, not useful in NEW_RULES.md.
• <a name="examples"/>: introduced an unclosed tag, which made GitHub render the following section underlined.

Problem:
The unclosed <a> tag caused large portions of the NEW_RULES.md to appear underlined on GitHub, making it harder to read.
See the image below:

Notes:

• No code changes, only documentation cleanup.

[welcome]

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[CLAassistant]

All committers have signed the CLA.

[emmambd]

Hi @PatrickSteil! Thanks for this great contribution and apologies for it slipping our notice in the midst of getting on top of emails after summer vacations. We plan to take a look soon.