Remove testing dfn

src/pages/en/guides/prologue/metadata.mdx

@@ -11,7 +11,7 @@ import Highlighting from "@components/common/Highlighting.astro";
 # Understanding Metadata
 
 Ninety-five percent of the web is [encrypted](https://twitter.com/jlivingood/status/1389584630299385856). That means that if you visit Facebook, your Internet Service Provider (ISP) can see that you visited and how long stayed, but they can't see your login credentials (username and password) or which exact pages you went to. This is done with the use of [Transport Layer Security](https://en.wikipedia.org/wiki/Transport_Layer_Security), or TLS, a powerful and increasingly popular encryption protocol used online.
-There are two problems with relying strictly on the current <dfn title="Transport Layer Security">TLS</dfn> model of the intert, however. First, it only protects data in transit. When you connect to Amazon, your ISP can see that you visited Amazon, but Amazon can see every page, click, and purchase without restriction. Second and more importantly, **often you don't need to see the content itself to start making powerful, accurate assumptions.**
+There are two problems with relying strictly on the current TLS model of the intert, however. First, it only protects data in transit. When you connect to Amazon, your ISP can see that you visited Amazon, but Amazon can see every page, click, and purchase without restriction. Second and more importantly, **often you don't need to see the content itself to start making powerful, accurate assumptions.**
 
 ## What is Metadata?