Do not vendor cookbooks using Berkshelf anymore

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

cookbooks/php/templates/default/extension.ini.erb

@@ -1,7 +0,0 @@
-; configuration for php <%= @name %> module
-<% @extensions.each do |filepath, zend| -%>
-<%= 'zend_' if zend %>extension=<%= filepath %>
-<% end -%>
-<% @directives.each do |k,v| -%>
-<%= "#{@name}.#{k}=#{v}" %>
-<% end -%>