Remove experimental note from sourcemaps wizard snippet (#7491)

Author: Luca Forstner

src/includes/sourcemaps-wizard-instructions.mdx

@@ -8,10 +8,3 @@ The wizard will guide you through the following steps:
 - Installing the necessary Sentry packages
 - Configuring your build tool to generate and upload source maps
 - Configuring your CI to upload source maps
-
-<Alert level="warning">
-
-Configuring source maps upload with the Sentry Wizard is still experimental and [under development](https://github.com/getsentry/sentry-wizard/issues/290).
-Let us know on [GitHub](https://github.com/getsentry/sentry-wizard/issues/new/choose) if you have feedback or issues.
-
-</Alert>