Docs: Updated async quick start
Noted that the async driver is deprecated in favor of the reactive
streams driver.
@@ -14,10 +14,8 @@ The following code snippets come from the [`QuickTour.java`]({{< srcref "driver-
that can be found with the async driver source on github.
{{% note %}}
-There are two higher level MongoDB Asynchronous Java Drivers available, that users may find easier to work with due to their friendlier APIs:
-
-* [MongoDB RxJava Driver](http://mongodb.github.io/mongo-java-driver-rx/) An RxJava implementation of the MongoDB Driver.
-* [MongoDB Reactive Streams Java Driver](http://mongodb.github.io/mongo-java-driver-reactivestreams/) A Reactive Streams implementation for the JVM.
+The callback-based Async Java Driver has been deprecated in favor of the
+[MongoDB Reactive Streams Java Driver](http://mongodb.github.io/mongo-java-driver-reactivestreams/).
{{% /note %}}
## SingleResultCallback
