docs: updated Next.js deployment guide (#5756)

www/apps/docs/content/starters/nextjs-medusa-starter.mdx

@@ -13,35 +13,8 @@ import CorsErrorSection from '../troubleshooting/cors-issues.md'
 
 This document guides you to install and set up the Next.js Starter Storefront.
 
-<!-- vale docs.We = NO  -->
-
-<QueryNote
-  query={{
-    key: 'ref',
-    value: 'gatsby-medusa-starter'
-  }}
-  admonition={{
-    type: 'note'
-  }}
->
-  We've deprecated the Gatsby starter storefront and instead recommend using the Next.js Starter Storefront or [building your own custom storefront](../storefront/roadmap.mdx).
-</QueryNote>
-
-<!-- vale docs.We = YES  -->
-
 ![Next.js Starter Storefront](https://res.cloudinary.com/dza7lstvk/image/upload/v1700744057/Medusa%20Docs/Screenshots/next-js-starter-docs_tbu23j.jpg)
 
-## Instant Deployment to Vercel
-
-Instead of manually following this guide to install then later deploy the Next.js Starter Storefront, you can deploy the Next.js Starter Storefront to Vercel with this button:
-
-<a 
-  href="https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fmedusajs%2Fnextjs-starter-medusa.git&env=NEXT_PUBLIC_MEDUSA_BACKEND_URL&envDescription=URL%20of%20your%20Medusa%20Backend" className="img-url no-zoom-img">
-  <img src="https://vercel.com/button" alt="Deploy with Vercel" className="no-zoom-img"/>
-</a>
-
----
-
 ## Prerequisites
 
 Before following along with this guide, make sure you have v16 or greater of Node.js: