Removing svn:externals from tagged maven-plugins-pom

git-svn-id: https://svn.apache.org/repos/asf/servicemix/maven-plugins/maven-plugins-pom/tags/maven-plugins-pom-1@693405 13f79535-47bb-0310-9956-ffa450edef68
tree: 2fe2cc77fda76aab113cf61c1361d147eb35d5a5
  1. LICENSE
  2. NOTICE
  3. pom.xml