As Norsu won’t be part of 6.3.0 release, it is safe to assume that Norsu dependencies can be removed from 2.0.0 version.
Trying to build it during a dry run 6.3.0 release results in the following error

[ERROR] Failed to execute goal org.codehaus.mojo:versions-maven-plugin:2.16.2:use-releases (default-cli) on project magnolia-content-types-norsu: No matching release of info.magnolia:norsu-domain:jar:1.0.0-SNAPSHOT found for update -> [Help 1]

I will comment it out in pom.xml for now, so that the dry-run release tests can move on.