Remove public/ files for API apps

- Fixes #25180

railties/lib/rails/generators/rails/app/app_generator.rb

@@ -305,6 +305,17 @@ def delete_application_layout_file_if_api_option
         end
       end
 
+      def delete_public_files_if_api_option
+        if options[:api]
+          remove_file 'public/404.html'
+          remove_file 'public/422.html'
+          remove_file 'public/500.html'
+          remove_file 'public/apple-touch-icon-precomposed.png'
+          remove_file 'public/apple-touch-icon.png'
+          remove_file 'public/favicon.ico'
+        end
+      end
+
       def delete_js_folder_skipping_javascript
         if options[:skip_javascript]
           remove_dir 'app/assets/javascripts'

railties/test/generators/api_app_generator_test.rb

@@ -105,6 +105,12 @@ def skipped_files
        lib/assets
        vendor/assets
        test/helpers
-       tmp/cache/assets)
+       tmp/cache/assets
+       public/404.html
+       public/422.html
+       public/500.html
+       public/apple-touch-icon-precomposed.png
+       public/apple-touch-icon.png
+       public/favicon.ico)
   end
 end