Disable debug of assets by default

This reduces the time to load a page in development mode by 200%

config/environments/development.rb

@@ -23,7 +23,7 @@ Gitlab::Application.configure do
   config.assets.compress = false
 
   # Expands the lines which load the assets
-  config.assets.debug = true
+  # config.assets.debug = true
 
   # For having correct urls in mails
   config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }