o remove the group metadata processing bound to the legacy artifact system. a plugin manager will be responsible for creating any hints it may want to use. it's general preproccesing which could be anything. for our implementation we can just read the files directly if necessary. we can also simplify the deployment of hinting information as well.
maven/components/branches/MNG-2766/maven-core/src/main/java/org/apache/maven/plugin/DefaultPluginManager.java