Compatible with Redmine 3.4

Author: ishikawa999

app/controllers/custom_message_settings_controller.rb

@@ -40,7 +40,7 @@ def set_custom_message_setting
   end
 
   def custom_message_setting_params
-    params.fetch(:settings, {}).permit(:custom_messages_yaml, custom_messages: {})
+    params.fetch(:settings, {})
   end
 
   def set_lang