```ruby
module Spree
  module Admin
    module ProductsHelper
      def taxon_options_for(product)
        options = @taxons.map do |taxon|
          selected = product.taxons.include?(taxon)
          content_tag(:option,
                      value: taxon.id,
                      selected: ('selected' if selected)) do
                        (taxon.ancestors.pluck(:name) + [taxon.name]).join(" -> ")
                      end
        end
        safe_join(options)
      end

      def option_types_options_for(product)
        @option_types.map do |option_type|
          selected = product.option_types.include?(option_type)
          content_tag(:option,
                      value: option_type.id,
                      selected: ('selected' if selected)) do
            option_type.name
          end
        end
        safe_join(options)
      end

      def show_rebuild_vat_checkbox?
        Spree::TaxRate.included_in_price.exists?
      end
    end
  end
end
```

Remove unused admin products helpers
user
```ruby
module Spree
  module Admin
    module ProductsHelper
      def show_rebuild_vat_checkbox?
        Spree::TaxRate.included_in_price.exists?
      end
    end
  end
end
```
assistant