remove old and obsolete plugin repository


git-svn-id: https://svn.apache.org/repos/asf/geronimo/genesis/trunk@1454274 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare release genesis-2.1

git-svn-id: https://svn.apache.org/repos/asf/geronimo/genesis/trunk@1454276 13f79535-47bb-0310-9956-ffa450edef68