Remove unused admin helpers

backend/app/controllers/spree/admin/base_controller.rb

@@ -2,7 +2,6 @@ module Spree
   module Admin
     class BaseController < Spree::BaseController
       helper 'spree/admin/navigation'
-      helper 'spree/admin/tables'
       layout '/spree/layouts/admin'
 
       before_action :authorize_admin

backend/app/helpers/spree/admin/base_helper.rb

@@ -130,12 +130,6 @@ def admin_layout(layout = nil)
         @admin_layout = layout if layout
         @admin_layout
       end
-
-      private
-
-      def attribute_name_for(field_name)
-        field_name.tr(' ', '_').downcase
-      end
     end
   end
 end

backend/app/helpers/spree/admin/products_helper.rb

@@ -1,30 +1,6 @@
 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