Do not vendor cookbooks using Berkshelf anymore

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

cookbooks/openssl/resources/dhparam.rb

@@ -1,28 +0,0 @@
-include OpenSSLCookbook::Helpers
-
-property :name,        String, name_property: true
-property :key_length,  equal_to: [1024, 2048, 4096, 8192], default: 2048
-property :generator,   equal_to: [2, 5], default: 2
-property :owner,       String
-property :group,       String
-property :mode,        [Integer, String]
-
-action :create do
-  unless dhparam_pem_valid?(new_resource.name) # ~FC023
-    converge_by("Create a dhparam file #{@new_resource}") do
-      dhparam_content = gen_dhparam(new_resource.key_length, new_resource.generator).to_pem
-
-      log "Generating #{new_resource.key_length} bit "\
-          "dhparam file at #{new_resource.name}, this may take some time"
-
-      file new_resource.name do
-        action :create
-        owner new_resource.owner
-        group new_resource.group
-        mode new_resource.mode
-        sensitive true
-        content dhparam_content
-      end
-    end
-  end
-end