diff --git a/app/models/concerns/line_item_based_adjustment_handling.rb b/app/models/concerns/line_item_based_adjustment_handling.rb
deleted file mode 100644
index 70aa9549c7..0000000000
--- a/app/models/concerns/line_item_based_adjustment_handling.rb
+++ /dev/null
@@ -1,8 +0,0 @@
-module LineItemBasedAdjustmentHandling
-  extend ActiveSupport::Concern
-
-  included do
-    has_many :adjustments_for_which_source, class_name: "Spree::Adjustment", as: :source,
-                                            dependent: :destroy
-  end
-end
diff --git a/app/models/spree/line_item.rb b/app/models/spree/line_item.rb
index 5813511577..bf58e337ab 100644
--- a/app/models/spree/line_item.rb
+++ b/app/models/spree/line_item.rb
@@ -7,7 +7,6 @@ module Spree
   class LineItem < ActiveRecord::Base
     include VariantUnits::VariantAndLineItemNaming
     include LineItemStockChanges
-    include LineItemBasedAdjustmentHandling
 
     belongs_to :order, class_name: "Spree::Order", inverse_of: :line_items
     belongs_to :variant, class_name: "Spree::Variant"