Remove node_modules path from assets load paths since we use webpack by default

Related to #33079

railties/lib/rails/generators/rails/app/templates/config/initializers/assets.rb.tt

@@ -5,10 +5,6 @@ Rails.application.config.assets.version = '1.0'
 
 # Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path
-<%- unless options[:skip_javascript] -%>
-# Add Yarn node_modules folder to the asset load path.
-Rails.application.config.assets.paths << Rails.root.join('node_modules')
-<%- end -%>
 
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in the app/assets

railties/test/generators/shared_generator_tests.rb

@@ -339,16 +339,12 @@ def test_generator_for_yarn
     skip "#34009 disabled JS by default for plugins" if generator_class.name == "Rails::Generators::PluginGenerator"
     run_generator
     assert_file "#{application_path}/package.json", /dependencies/
-    assert_file "#{application_path}/config/initializers/assets.rb", /node_modules/
+    assert_file "#{application_path}/bin/yarn"
   end
 
   def test_generator_for_yarn_skipped
     run_generator([destination_root, "--skip-javascript"])
     assert_no_file "#{application_path}/package.json"
     assert_no_file "#{application_path}/bin/yarn"
-
-    assert_file "#{application_path}/config/initializers/assets.rb" do |content|
-      assert_no_match(/node_modules/, content)
-    end
   end
 end