Update performance-insights-overview.md

[komala2019]

We are no more supporting the performance insights feature for production.

[learn-build-service-prod]

Learn Build status updates of commit 2b468aa:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
powerapps-docs/maker/common/performance-insights-overview.md	⚠️Warning		Details

powerapps-docs/maker/common/performance-insights-overview.md

• Line 1, Column 1: [Warning: author-missing - See documentation] Missing required attribute: 'author'. Add the current author's GitHub ID.
• Line 1, Column 1: [Warning: title-missing - See documentation] Missing required attribute: 'title'. Add a title string to show in search engine results.
• Line 1, Column 1: [Warning: ms-author-missing - See documentation] Missing required attribute: 'ms.author'. Add the current author's Microsoft alias.
• Line 1, Column 1: [Warning: ms-topic-missing - See documentation] Missing required attribute: 'ms.topic'.
• Line 16, Column 1: [Warning: h1-not-first - See documentation] Markdown content is not allowed before H1 'What are performance insights? (preview)'.
• Line 1, Column 1: [Suggestion: description-missing - See documentation] Missing required attribute: 'description'.

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