Do not vendor cookbooks using Berkshelf anymore

Instead, use the Berkshelf support in knife-solo and the
vagrant-berkshelf plugin on Vagrant

cookbooks/nodejs/recipes/repo.rb

@@ -1,20 +0,0 @@
-case node['platform_family']
-when 'debian'
-  package 'nodejs-apt-transport-https' do
-    package_name 'apt-transport-https'
-  end
-
-  apt_repository 'node.js' do
-    uri node['nodejs']['repo']
-    distribution node['lsb']['codename']
-    components ['main']
-    keyserver node['nodejs']['keyserver']
-    key node['nodejs']['key']
-  end
-when 'rhel', 'amazon'
-  yum_repository 'node.js' do
-    description 'nodesource.com nodejs repository'
-    baseurl node['nodejs']['repo']
-    gpgkey node['nodejs']['key']
-  end
-end