docs: remove gitpod as a playground platform (#1057)

Author: sarah11918

docs/content/2.guide/1.features.md

@@ -88,7 +88,6 @@ Quick access to online development environments detected from package READMEs:
 | :icon{name="i-lucide-pen-tool"} [CodePen](https://codepen.io)                  | Social development environment for front-end |
 | :icon{name="i-simple-icons-jsfiddle"} [JSFiddle](https://jsfiddle.net)         | Online editor for web snippets               |
 | :icon{name="i-simple-icons-replit"} [Replit](https://replit.com)               | Collaborative browser-based IDE              |
-| :icon{name="i-simple-icons-gitpod"} [Gitpod](https://gitpod.io)                | Cloud development environments               |
 
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