Added:
- No new content was added.

Changed:
 No existing content was changed.

Removed:
 * The entire top navigation bar, including links to "Blog", "Changelog", "Docs", "Customer stories", "Try GitHub Copilot app", "Attend GitHub Universe", and a search bar.
 * The page header containing the title "Changelog", an RSS feed link, and a link to follow @ghchangelog on X.
 * The pagination section for navigating between years (2026–2018).
 * The entire comprehensive footer with site-wide links organized into sections for Product, Platform, Support, and Company, along with social media links and legal information.