Remove topics frontmatter from desktop docs (#59855)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: subatoi <32935794+subatoi@users.noreply.github.com>

Author: Copilot

content/desktop/index.md

@@ -28,9 +28,6 @@ changelog:
 layout: product-landing
 versions:
   feature: desktop
-topics:
-  - Desktop
-  - Repositories
 children:
   - /overview
   - /installing-and-authenticating-to-github-desktop