Do not vendor cookbooks using Berkshelf anymore

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

cookbooks/redis/metadata.rb

@@ -1,15 +0,0 @@
-name              "redis"
-maintainer        "Phil Cohen"
-maintainer_email  "github@phlippers.net"
-license           "MIT"
-description       "Installs and configures Redis"
-version           "0.5.6"
-
-recipe "redis::default", "Sets up ppa apt repository"
-recipe "redis::server", "Installs redis server"
-recipe "redis::client", "Installs redis client"
-
-supports "debian"
-supports "ubuntu"
-
-depends "apt"