docs: remove broken links from showcase

content/notes/showcase.md

@@ -9,7 +9,6 @@ Want to see what Quartz can do? Here are some cool community gardens :)
 - [Scaling Synthesis - A hypertext research notebook](https://scalingsynthesis.com/)
 - [AWAGMI Intern Notes](https://notes.awagmi.xyz/)
 - [Shihyu's PKM](https://shihyuho.github.io/pkm/)
-- [Chloe's Garden](https://garden.chloeabrasada.online/)
 - [SlRvb's Site](https://slrvb.github.io/Site/)
 - [Course notes for Information Technology Advanced Theory](https://a2itnotes.github.io/quartz/)
 - [Brandon Boswell's Garden](https://brandonkboswell.com)