Merge pull request rails#25639 from y-yagi/followup_to_25431

fix task name to remove

Author: rafaelfranca

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

@@ -229,7 +229,7 @@ def update_config_files
       def display_upgrade_guide_info
         say "\nAfter this, check Rails upgrade guide at http://guides.rubyonrails.org/upgrading_ruby_on_rails.html for more details about upgrading your app."
       end
-      remove_task :display_upgrade_info
+      remove_task :display_upgrade_guide_info
 
       def create_boot_file
         template "config/boot.rb"