Only refresh site settings once on initialization.

config/environments/development.rb

@@ -59,9 +59,6 @@ Discourse::Application.configure do
   end
 
   config.after_initialize do
-    SiteSetting.defaults.set_regardless_of_locale(:port, 3000)
-    SiteSetting.refresh!
-
     if ENV['BULLET']
       Bullet.enable = true
       Bullet.rails_logger = true