rm some stuff

Author: chargome

docs/platforms/javascript/guides/nextjs/manual-setup.mdx

@@ -189,9 +189,7 @@ Sentry.init({
 ```
 
 <Alert level="success" title="Tip">
-  Include your [Data Source Name](/concepts/key-terms/dsn-explainer/) (DSN)
-  directly in these files, or use a _public_ environment variable like
-  `NEXT_PUBLIC_SENTRY_DSN`.
+  Include your DSN directly in these files, or use a _public_ environment variable like `NEXT_PUBLIC_SENTRY_DSN`.
 </Alert>
 
 ### Register Sentry Server-Side SDK Initialization
@@ -210,12 +208,6 @@ export async function register() {
 }
 ```
 
-<Alert level="warning" title="Next.js version <15 only">
-  You need to enable the instrumentation hook by setting the
-  `experimental.instrumentationHook` to `true` in your `next.config.(js|mjs)`
-  file.
-</Alert>
-
 <Expandable title="Opt out of Sentry SDK bundling on client- or server-side.">
   If you want the Sentry SDK to be available on the server side and not on the
   client side, simply delete `instrumentation-client.(js|ts)`. This will prevent