set_position conflicts with acts_as_list

core/app/models/spree/variant.rb

@@ -73,7 +73,6 @@ class Variant < Spree::Base
     validates_uniqueness_of :sku, allow_blank: true, case_sensitive: true, conditions: -> { where(deleted_at: nil) }, if: :enforce_unique_sku?
 
     after_create :create_stock_items
-    after_create :set_position
     after_create :set_master_out_of_stock, unless: :is_master?
 
     after_save :clear_in_stock_cache
@@ -406,10 +405,6 @@ def build_vat_prices
       Spree::Config.variant_vat_prices_generator_class.new(self).run
     end
 
-    def set_position
-      update_column(:position, product.variants.maximum(:position).to_i + 1)
-    end
-
     def in_stock_cache_key
       "variant-#{id}-in_stock"
     end

core/spec/models/spree/variant_spec.rb

@@ -574,14 +574,6 @@
     end
   end
 
-  # Regression test for https://github.com/spree/spree/issues/2744
-  describe "set_position" do
-    it "sets variant position after creation" do
-      variant = create(:variant)
-      expect(variant.position).to_not be_nil
-    end
-  end
-
   describe '#in_stock?' do
     before do
       stub_spree_preferences(track_inventory_levels: true)