docs: drop chlog for data

[Borda]

What does this PR do?

implication of #19420 (comment)

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📚 Documentation preview 📚: https://pytorch-lightning--19422.org.readthedocs.build/en/19422/

[github-actions]

⚡ Required checks status: All passing 🟢

No groups match the files changed in this PR.

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Thank you for your contribution! 💜

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