Do not vendor cookbooks using Berkshelf anymore

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

cookbooks/redis/recipes/client.rb

@@ -1,10 +0,0 @@
-#
-# Cookbook Name:: redis
-# Recipe:: client
-#
-
-include_recipe "redis::default"
-
-package "redis-tools" do
-  action node["redis"]["auto_upgrade"] ? :upgrade : :install
-end