Remove 1.6 notification for Scroll View

(cherry picked from commit c3d63f4)

Author: pm-gusmano

docs/presentations/revealjs/presenting.qmd

@@ -110,8 +110,6 @@ You can enable Overview Mode by pressing the {{< kbd O >}} key.
 
 ## Scroll View {#scroll-view}
 
-{{< include /docs/prerelease/1.6/_pre-release-feature.qmd >}}
-
 Reveal presentations can be presented in [Scroll View](https://revealjs.com/scroll-view/) with vertically scrolled navigation instead of Slides. This is a new view mode introduced in Revealjs 5. It is always available in presentations as an alternative view mode (like [Print view](#print-to-pdf)), and it will be used as the default view on small screens (e.g. viewing a presentation on a mobile).
 
 Our demo presentation can be seen [in scroll view mode](https://{{< meta prerelease-subdomain >}}quarto.org/docs/presentations/revealjs/demo/?view=scroll) and below