Remove benefit modules

Author: mamhoff

promotions/app/models/concerns/solidus_promotions/benefits/line_item_benefit.rb

@@ -3,7 +3,6 @@
 module SolidusPromotions
   module Benefits
     class CreateDiscountedItem < Benefit
-      include OrderBenefit
       preference :variant_id, :integer
       preference :quantity, :integer, default: 1
       preference :necessary_quantity, :integer, default: 1
@@ -19,6 +18,11 @@ def remove_from(order)
         order.line_items.destroy(line_item)
       end
 
+      def level
+        :order
+      end
+      deprecate :level, deprecator: Spree.deprecator
+
       private
 
       def discount_line_item(line_item, ...)

promotions/app/models/concerns/solidus_promotions/benefits/order_benefit.rb

@@ -5,6 +5,14 @@
 RSpec.describe SolidusPromotions::Benefits::CreateDiscountedItem do
   it { is_expected.to respond_to(:preferred_variant_id) }
 
+  describe "can_discount?" do
+    let(:discountable) { Spree::LineItem.new }
+
+    subject { described_class.new.can_discount?(discountable)}
+
+    it { is_expected.to be false }
+  end
+
   describe "#perform" do
     let(:order) { create(:order_with_line_items) }
     let(:promotion) { create(:solidus_promotion) }