Remove config to toggle Address name fields behaviour

core/lib/generators/solidus/install/templates/config/initializers/spree.rb.tt

@@ -10,9 +10,6 @@ Spree.config do |config|
   # from address for transactional emails
   config.mails_from = "store@example.com"
 
-  # Use combined first and last name attribute in HTML views and API responses
-  config.use_combined_first_and_last_name_in_address = true
-
   # Use legacy Spree::Order state machine
   config.use_legacy_order_state_machine = false
 

core/lib/spree/app_configuration.rb

@@ -307,10 +307,6 @@ class AppConfiguration < Preferences::Configuration
     #   @return [] Track on_hand values for variants / products. (default: true)
     preference :track_inventory_levels, :boolean, default: true
 
-    # @!attribute [rw] use_combined_first_and_last_name_in_address
-    #   @return [Boolean] Use Spree::Address combined first and last name in HTML views and
-    #   API responses. (default: +false+)
-    preference :use_combined_first_and_last_name_in_address, :boolean, default: false
 
     # @!attribute [rw] use_legacy_order_state_machine
     #   @return [Boolean] Uses the legacy order state machine from Spree::Order::Checkout

core/lib/spree/testing_support/dummy_app.rb

@@ -119,7 +119,6 @@ class Application < ::Rails::Application
   config.raise_with_invalid_currency = false
   config.redirect_back_on_unauthorized = true
   config.run_order_validations_on_order_updater = true
-  config.use_combined_first_and_last_name_in_address = true
   config.use_legacy_order_state_machine = false
   config.use_custom_cancancan_actions = false
   config.consider_actionless_promotion_active = false