Do not vendor cookbooks using Berkshelf anymore

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

cookbooks/apache2/recipes/mod_unixd.rb

@@ -1,25 +0,0 @@
-#
-# Cookbook:: apache2
-# Recipe:: mod_unixd
-#
-# Copyright:: 2014, OneHealth Solutions, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# on platform_family debian this module is staticly linked into apache2
-if node['apache']['version'] == '2.4' && !platform_family?('debian')
-  apache_module 'unixd'
-else
-  log 'Ignoring apache2::mod_unixd. Not available until apache 2.4'
-end