Artifacts missing in maven-aether-provider in Maven 3.1.0

Hi all!

When switching from 3.0.4 to 3.1.0 I encountered that obviously the classes

* org.apache.maven.repository.internal.MavenRepositorySystemSession
* org.apache.maven.repository.internal.MavenServiceLocator

are no longer there. Seems, the last version with these classes was 3.0.5.

However, if I check out maven-aether-provider from http://svn.apache.org/repos/asf/maven/maven-3/tags/maven-3.1.0/maven-aether-provider and have a look at the sources, the classes are there. The Jar after building the project also contains them. But the official Jar at Maven Central does not.

Tried to find a hint somewhere inside the release notes with no success. So, can anyone tell me what's going on here? Where are these classes?

Thanks for any help!
Bernd