diff --git a/app/services/spree/cart/add_item_decorator.rb b/app/services/spree/cart/add_item_decorator.rb
deleted file mode 100644
index f7c216fe..00000000
--- a/app/services/spree/cart/add_item_decorator.rb
+++ /dev/null
@@ -1,34 +0,0 @@
-if Spree.version.to_f > 3.7
-  module Spree::Cart::AddItemDecorator
-    private
-
-    def add_to_line_item(order:, variant:, quantity: nil, options: {})
-      options ||= {}
-      quantity ||= 1
-
-      line_item = Spree::Dependencies.line_item_by_variant_finder.constantize.new.execute(order: order, variant: variant, options: options)
-
-      line_item_created = line_item.nil?
-      if line_item.nil?
-        opts = ::Spree::PermittedAttributes.line_item_attributes.flatten.each_with_object({}) do |attribute, result|
-          result[attribute] = options[attribute]
-        end.merge(currency: order.currency).delete_if { |_key, value| value.nil? }
-
-        line_item = order.line_items.new(quantity: quantity,
-                                          variant: variant,
-                                          options: opts)
-      else
-        line_item.quantity += quantity.to_i
-      end
-
-      line_item.target_shipment = options[:shipment] if options.key? :shipment
-
-      return failure(line_item) unless line_item.save
-
-      ::Spree::TaxRate.adjust(order, [line_item.reload]) if line_item_created
-      success(order: order, line_item: line_item, line_item_created: line_item_created, options: options)
-    end
-  end
-
-  Spree::Cart::AddItem.prepend Spree::Cart::AddItemDecorator
-end