Remove some keys from legacy copy/show

Setting with key 'days_to_keep_business_registry_cache' is not copied/shown now.
Setting with key 'default_language' is copied, but shown only once now.

app/controllers/admin/settings_controller.rb

@@ -7,6 +7,7 @@ module Admin
       @validation_settings = SettingEntry.with_group('domain_validation')
       @expiration_settings = SettingEntry.with_group('domain_expiration')
       @other_settings = SettingEntry.with_group('other')
+                                    .where.not(code: 'default_language')
       @billing_settings = SettingEntry.with_group('billing')
       @contacts_settings = SettingEntry.with_group('contacts')
     end

db/data/20200812093540_copy_legacy_settings_to_new_model.rb

@@ -52,6 +52,7 @@ class CopyLegacySettingsToNewModel < ActiveRecord::Migration[6.0]
     old_settings = ActiveRecord::Base.connection.execute(sql)
 
     old_settings.each do |origin|
+      next if origin['var'] == 'days_to_keep_business_registry_cache'
       entry = SettingEntry.find_or_initialize_by(code: origin['var'])
       entry[:format] = 'string'
       entry[:format] = 'boolean' if boolean_vars.include? entry.code