Do not vendor cookbooks using Berkshelf anymore

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

cookbooks/redis/spec/client_spec.rb

@@ -1,27 +0,0 @@
-require "spec_helper"
-
-describe "redis::client" do
-  let(:chef_run) do
-    ChefSpec::SoloRunner.new.converge(described_recipe)
-  end
-
-  it { expect(chef_run).to include_recipe("redis::default") }
-
-  describe "package installation" do
-    describe "default action" do
-      it { expect(chef_run).to install_package("redis-tools") }
-      it { expect(chef_run).to_not upgrade_package("redis-tools") }
-    end
-
-    describe "when `auto_upgrade` is `true`" do
-      let(:chef_run) do
-        ChefSpec::SoloRunner.new do |node|
-          node.set["redis"]["auto_upgrade"] = true
-        end.converge(described_recipe)
-      end
-
-      it { expect(chef_run).to_not install_package("redis-tools") }
-      it { expect(chef_run).to upgrade_package("redis-tools") }
-    end
-  end
-end