Remove usage of ProductDistribution which is dead

Sample data was failing since:
https://github.com/openfoodfoundation/openfoodnetwork/pull/3570

lib/tasks/sample_data/product_factory.rb

@@ -76,18 +76,6 @@ class ProductFactory
       unit_value: 1,
       on_demand: true
     )
-    create_product_with_distribution(params, hash[:supplier])
-  end
-
-  def create_product_with_distribution(params, supplier)
-    product = Spree::Product.create_with(params).find_or_create_by_name!(params[:name])
-
-    distribution_params = {
-      distributor_id: params[:distributor].id,
-      enterprise_fee_id: supplier.enterprise_fees.first.id
-    }
-    ProductDistribution.create_with(distribution_params).find_or_create_by_product_id!(product.id)
-
-    product
+    Spree::Product.create_with(params).find_or_create_by_name!(params[:name])
   end
 end