Include webui helpers, and not project helpers

As no longer needed Bento helpers were removed from
Webui::PackageHelper, there is no need to include
Webui::ProjectHelper.

We need to include Webui::WebuiHelper, as there are still
helpers from webui that are used in packages views. For example
"elide".

src/api/app/helpers/webui/package_helper.rb

@@ -1,4 +1,6 @@
 module Webui::PackageHelper
+  include Webui::WebuiHelper
+
   def removable_file?(file_name:, package:)
     !file_name.start_with?('_service:') && !package.belongs_to_product?
   end
@@ -43,8 +45,6 @@ def guess_code_class(filename)
     end
   end
 
-  include Webui::ProjectHelper
-
   def nbsp(text)
     result = ''.html_safe
     text.split(' ').each do |text_chunk|