Update shipping_category in /lib and /engines

engines/dfc_provider/app/services/supplied_product_builder.rb

@@ -22,7 +22,6 @@ class SuppliedProductBuilder < DfcBuilder
       description: supplied_product.description,
       price: 0, # will be in DFC Offer
       primary_taxon: Spree::Taxon.first, # dummy value until we have a mapping
-      shipping_category: DefaultShippingCategory.find_or_create,
     ).tap do |product|
       QuantitativeValueBuilder.apply(supplied_product.quantity, product)
     end

lib/tasks/sample_data/product_factory.rb

@@ -68,7 +68,6 @@ module SampleData
         variant_unit: "weight",
         variant_unit_scale: 1,
         unit_value: 1,
-        shipping_category: DefaultShippingCategory.find_or_create,
         tax_category_id: find_or_create_tax_category.id
       )
       product = Spree::Product.create_with(params).find_or_create_by!(name: params[:name])