Simplify DFC product controller

engines/dfc_provider/app/controllers/dfc_provider/supplied_products_controller.rb

@@ -20,14 +20,8 @@ module DfcProvider
       )
       product = variant.product
 
-      if product.new_record?
-        product.supplier = current_enterprise
-        product.save!
-      end
-
-      if variant.new_record?
-        variant.save!
-      end
+      product.save! if product.new_record?
+      variant.save! if variant.new_record?
 
       supplied_product = SuppliedProductBuilder.supplied_product(variant)
       render json: DfcIo.export(supplied_product)

engines/dfc_provider/app/services/supplied_product_builder.rb

@@ -35,6 +35,7 @@ class SuppliedProductBuilder < DfcBuilder
       end
     else
       product = import_product(supplied_product)
+      product.supplier = supplier
       product.ensure_standard_variant
       product.variants.first
     end