Update introduction.md (#11092)

* Update introduction.md

AMP is no longer an acronym for "Accelerated Mobile Pages"

* Update docs/advanced-features/amp-support/introduction.md
Co-authored-by: NTim Neutkens <tim@timneutkens.nl>

docs/advanced-features/amp-support/introduction.md

@@ -11,7 +11,6 @@ description: With minimal config, and without leaving React, you can start addin
   </ul>
 </details>
 
-AMP means "_Accelerated Mobile Pages_", and it's, in short words: A faster HTML.
 
 With Next.js you can turn any React page into an AMP page, with minimal config, and without leaving React.