Remove placement-of-comment-based-help.md

[matt9ucci]

• It has no useful information
• Its subsections, Placing Comment-Based Help in Functions and Placing Comment-Based Help in Scripts, are directly linked from Writing Comment-Based Help Topics

[zjalexander]

✅ Validation status: passed

File	Status	Preview URL	Details
developer/TOC.yml	✅Succeeded	View
developer/help/placement-of-comment-based-help.md	✅Succeeded

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Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.

[DCtheGeek]

@matt9ucci I reviewed this with @sdwheeler and he agreed with the change. We've merged it in. Thanks again for the contribution and helping clean up this content!