Update v23.1.0.md

Remove broken link until after GA release

_includes/releases/v23.1/v23.1.0.md

@@ -4,8 +4,6 @@ Release Date: May 15, 2023
 
 With the release of CockroachDB v23.1, we've added new capabilities in CockroachDB to help you migrate, build, and operate more efficiently. Check out a [summary of the most significant user-facing changes](#v23-1-0-feature-highlights) and then [upgrade to CockroachDB v23.1](../v23.1/upgrade-cockroach-version.html).
 
-To learn more about the launch, see the [v23.1 launch page](cockroachlabs.com/whatsnew.html).
-
 {% include releases/release-downloads-docker-image.md release=include.release %}
 
 <h3 id="v23-1-0-{{ site.data.products.db | downcase | replace: " ", "-" }}">{{ site.data.products.db }}</h3>