Remove reference to FactoryGirl, it's FactoryBot that is used in OFN

spec/models/spree/variant_spec.rb

@@ -21,7 +21,7 @@ module Spree
     context "product has other variants" do
       describe "option value accessors" do
         before {
-          @multi_variant = FactoryGirl.create :variant, product: variant.product
+          @multi_variant = create(:variant, product: variant.product)
           variant.product.reload
         }