Do not vendor cookbooks using Berkshelf anymore

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

cookbooks/hostname/.kitchen.yml

@@ -1,34 +0,0 @@
----
-driver_plugin: vagrant
-driver_config:
-  require_chef_omnibus: true
-
-platforms:
-  - name: ubuntu-12.04
-  - name: ubuntu-14.04
-  - name: ubuntu-16.04
-  - name: debian-7.11
-  - name: debian-8.5
-  - name: centos-6.8
-  - name: centos-7.2
-  - name: freebsd-9.3
-  - name: freebsd-10.3
-  - name: fedora-21
-  - name: fedora-22
-  - name: fedora-23
-  - name: fedora-24
-
-suites:
-  - name: default
-    run_list:
-      - recipe[hostname::default]
-    attributes:
-      set_fqdn: test.example.com
-  - name: wildcard
-    run_list:
-      - recipe[hostname::default]
-    provisioner:
-      solo_rb:
-        node_name: test
-    attributes:
-      set_fqdn: '*.example.com'