Revert "Link application.js in manifest"

This reverts commit a3b2d19.

Author: jcoyne

spec/test_app_templates/lib/generators/test_app_generator.rb

@@ -31,7 +31,6 @@ def run_spotlight_migrations
 
   def add_spotlight_routes_and_assets
     generate :'spotlight:install', '-f --mailer_default_url_host=localhost:3000'
-    append_to_file 'app/assets/config/manifest.js', "\n//= link application.js\n" if Rails.version > '7' && File.exist?('app/assets/config/manifest.js')
   end
 
   def install_test_catalog_controller