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_pagespeed.rb

@@ -1,37 +0,0 @@
-#
-# Cookbook:: apache2
-# Recipe:: mod_pagespeed
-#
-# Copyright:: 2013, ZOZI
-#
-# 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.
-#
-
-if platform_family?('debian')
-  remote_file "#{Chef::Config[:file_cache_path]}/mod-pagespeed.deb" do
-    source node['apache2']['mod_pagespeed']['package_link']
-    mode '0644'
-    action :create_if_missing
-  end
-
-  package 'mod_pagespeed' do
-    source "#{Chef::Config[:file_cache_path]}/mod-pagespeed.deb"
-    action :install
-  end
-
-  apache_module 'pagespeed' do
-    conf true
-  end
-else
-  Chef::Log.warn "apache::mod_pagespeed does not support #{node['platform_family']} yet, and is not being installed"
-end