[CI] Remove non-distill example website (#502)

Co-authored-by: cderv <[email protected]>

vignettes/examples.yml

@@ -1,44 +1,32 @@
-- title: "RStudio AI Blog"
+- title: RStudio AI Blog
   img: images/rstudio-ai.png
   href: https://blogs.rstudio.com/ai/
   showcase: true
-- title: "Piping Hot Data"
+- title: Piping Hot Data
   img: images/piping-hot-data.png
   href: https://www.pipinghotdata.com/
   showcase: true
-- title: "Before I Sleep"
+- title: Before I Sleep
   img: images/miles-mcbain.png
   href: https://milesmcbain.xyz/
   showcase: true
-- title: "The Mockup"
-  img: images/mockup.png
-  href: https://themockup.blog
-  showcase: true
-- title: "Michael Clark: Statistics, Data, Science"
+- title: 'Michael Clark: Statistics, Data, Science'
   img: images/m-clark.png
   href: https://m-clark.github.io/
   showcase: true
-- title: "Matt Worthington"
-  img: images/mr-worthington.png
-  href: https://www.mrworthington.com/
-  showcase: true
-- title: "Open Source Football"
+- title: Open Source Football
   img: images/open-source-football.png
   href: https://www.opensourcefootball.com/
   showcase: true
-- title: "Taras Kaduk"
+- title: Taras Kaduk
   img: images/taras-kaduk.png
   href: https://taraskaduk.com/
   showcase: true
-- title: "Teaching in Production"
+- title: Teaching in Production
   img: images/rstudio-tip.png
   href: https://rstd.io/tip
   showcase: true
-- title: "Tidyquintro"
-  img: images/tidyquintro.png
-  href: https://athanasiamo.github.io/tidyquintro/
-  showcase: true
-- title: "Tidymodels, Virtually"
+- title: Tidymodels, Virtually
   img: images/tmv.png
   href: https://tmv.netlify.app/site/
   showcase: true