Do not vendor cookbooks using Berkshelf anymore

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

cookbooks/redis/.travis.yml

@@ -1,19 +0,0 @@
-language: ruby
-bundler_args: --jobs 3 --without integration
-rvm:
-- 1.9.3
-- 2.0.0
-- 2.1.5
-before_script:
-- "gem install bundler-audit --no-rdoc --no-ri && bundle-audit update"
-script:
-- bundle-audit
-- bundle exec rake rubocop
-- bundle exec rake foodcritic
-- bundle exec rake chefspec
-- bundle exec rake kitchen:all
-- bundle exec license_finder --quiet
-env:
-  matrix:
-  - CHEF_VERSION: "10.30"
-  - CHEF_VERSION: "11.16"