MavenDependencyFacet.hasRepository() removes repository if it exists.

@Override
   public boolean hasRepository(final String url)
   {
      if (url != null)
      {
         MavenCoreFacet maven = project.getFacet(MavenCoreFacet.class);
         Model pom = maven.getPOM();
         List<Repository> repositories = pom.getRepositories();
         for (Repository repo : repositories)
         {
            if (repo.getUrl().trim().equals(url.trim()))
            {
               repositories.remove(repo);
               maven.setPOM(pom);
               return true;
            }
         }
      }
      return false;
   }