docs: remove obsolete github instructions sheets

[Blackbaud-SandhyaRajasabeson]

No description provided.

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests (beta)

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit ce2a702

Command	Status	Duration	Result
nx build code-examples-playground --baseHref=ht...	✅ Succeeded	19s	View ↗
nx build playground --baseHref=https://blackbau...	✅ Succeeded	10s	View ↗
nx build integration --baseHref=https://blackba...	✅ Succeeded	8s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-02-11 17:11:00 UTC

[blackbaud-sky-build-user]

Storybook preview

Component Storybooks:

• (no component storybooks affected in this pr)

Apps:

• code-examples-playground
• integration
• playground