Upgrade Rails to 8.0

config/initializers/assets.rb

@@ -7,8 +7,3 @@ Rails.application.config.assets.version = "1.0"
 # Rails.application.config.assets.paths << Emoji.images_path
 # Add Yarn node_modules folder to the asset load path.
 Rails.application.config.assets.paths << Rails.root.join('node_modules')
-
-# Precompile additional assets.
-# application.js, application.css, and all non-JS/CSS in the app/assets
-# folder are already added.
-# Rails.application.config.assets.precompile += %w[ admin.js admin.css ]