diff --git a/config/initializers/spree.rb b/config/initializers/spree.rb
index 83e854a08f..5c60a92778 100644
--- a/config/initializers/spree.rb
+++ b/config/initializers/spree.rb
@@ -7,7 +7,6 @@
 # config.setting_name = 'new value'
 
 require 'spree/product_filters'
-require 'spree/core/calculated_adjustments_decorator'
 
 require "#{Rails.root}/app/models/spree/payment_method_decorator"
 require "#{Rails.root}/app/models/spree/gateway_decorator"
diff --git a/lib/spree/core/calculated_adjustments_decorator.rb b/lib/spree/core/calculated_adjustments_decorator.rb
deleted file mode 100644
index 592bf59854..0000000000
--- a/lib/spree/core/calculated_adjustments_decorator.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-module Spree
-  module Core
-    module CalculatedAdjustments
-      class << self
-        def included_with_explicit_class_name(klass)
-          included_without_explicit_class_name(klass)
-
-          klass.class_eval do
-            has_one :calculator, as: :calculable, dependent: :destroy, class_name: 'Spree::Calculator'
-          end
-        end
-        alias_method_chain :included, :explicit_class_name
-      end
-    end
-  end
-end