Dependency diagram clean

[jyotimahato-12]

Description

_This PR follows the original issue instructions and reviewer guidance.

Changes included:

• Removed dependency diagram from incorrect locations
• Kept only the required documentation structure
• No unrelated or extra files included

This is a clean PR with only the necessary changes.

Thanks for the review.

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📚 Documentation preview 📚: https://plone6--2023.org.readthedocs.build/

[stevepiercy]

This is of very poor quality, and disrespects volunteers' time. Please read and follow https://6.docs.plone.org/contributing/first-time.html#update-your-pull-request-from-your-fork, and before you open a pull request, make sure that you don't add garbage from your editor and other unnecessary content.

https://github.com/plone/documentation/pull/2023/files#diff-c32544aac2733ed5aeed9900c8a2422cd67ba16ff8c55babf4d08461d218b0a3R1

If it happens again, I'm sorry, but I will have to suspend you from contributing to Plone documentation. This behavior does not respect volunteer time. See:

• https://6.docs.plone.org/contributing/first-time.html#expectations-of-first-time-contributors
• https://6.docs.plone.org/contributing/first-time.html#requirements