Drop config.assets since sprockets-rails isn't in rail 7

The dummy application doesn't need assets so it's easier to remove the calls instead
of adding a needless gem to the gemfile.  Rails 7 doesn't have sprocket-rails by default
so we'd need to drop these calls or add it to the Gemfile.

See: https://github.com/rails/rails/issues #43793

spec/dummy/config/environments/development.rb

@@ -45,14 +45,6 @@
   # Highlight code that triggered database queries in logs.
   config.active_record.verbose_query_logs = true
 
-  # Debug mode disables concatenation and preprocessing of assets.
-  # This option may cause significant delays in view rendering with a large
-  # number of complex assets.
-  config.assets.debug = true
-
-  # Suppress logger output for asset requests.
-  config.assets.quiet = true
-
   # Raises error for missing translations.
   # config.i18n.raise_on_missing_translations = true
 

spec/dummy/config/environments/production.rb

@@ -22,12 +22,6 @@
   # Apache or NGINX already handles this.
   config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
 
-  # Compress CSS using a preprocessor.
-  # config.assets.css_compressor = :sass
-
-  # Do not fallback to assets pipeline if a precompiled asset is missed.
-  config.assets.compile = false
-
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.action_controller.asset_host = 'http://assets.example.com'