Remove is_master and not_master scopes

(cherry picked from commit 1daab8994d)

lib/open_food_network/scope_variants_for_search.rb

@@ -33,7 +33,7 @@ module OpenFoodNetwork
     end
 
     def query_scope
-      Spree::Variant.where(is_master: false).
+      Spree::Variant.
         ransack(search_params.merge(m: 'or')).
         result.
         order("spree_products.name, display_name, display_as, spree_products.variant_unit_name").

lib/reporting/reports/products_and_inventory/base.rb

@@ -33,7 +33,6 @@ module Reporting
 
         def child_variants
           Spree::Variant.
-            where(is_master: false).
             joins(:product).
             merge(visible_products).
             order('spree_products.name')