chore: point to current versions in the Readme (#4344)

CODE_OF_CONDUCT.md

@@ -3,8 +3,5 @@ All repositories in these organizations:
 * [lightbend](https://github.com/lightbend)
 * [akka](https://github.com/akka)
 * [lagom](https://github.com/lagom)
-* [playframework](https://github.com/playframework)
-* [sbt](https://github.com/sbt)
-* [slick](https://github.com/slick)
 
 are covered by the Lightbend Community Code of Conduct: https://www.lightbend.com/conduct

README.md

@@ -1,8 +1,6 @@
 Akka HTTP
 =========
 
-[![akka-http-core Scala version support](https://index.scala-lang.org/akka/akka-http/akka-http-core/latest-by-scala-version.svg)](https://index.scala-lang.org/akka/akka-http/akka-http-core)
-
 The Akka HTTP modules implement a full server- and client-side HTTP stack on top
 of akka-actor and akka-stream. It's not a web-framework but rather a more
 general toolkit for providing and consuming HTTP-based services. While
@@ -27,6 +25,12 @@ The documentation is available at
 [Java](https://doc.akka.io/docs/akka-http/current/java/http/).
 
 
+Current versions of all Akka libraries
+--------------------------------------
+
+The current versions of all Akka libraries are listed on the [Akka Dependencies](https://doc.akka.io/docs/akka-dependencies/current/) page. Releases of the Akka HTTP libraries in this repository are listed on the [GitHub releases](https://github.com/akka/akka-http/releases) page.
+
+
 Community
 ---------
 You can join these groups and chats to discuss and ask Akka related questions: