Should the 'Maps' folder be cleaned of redirectors?

I am attempting to clean the ‘Maps’ folder in our project of redirectors at the moment. It had 4,098 objects to load and the process is barely 10% done when I started it at 9:30pm EST last night. I know that it’s recommended to clean your project of them every so often, but at this point I am not even sure if I should be cleaning the maps folder.

If I don’t need to do this, is it safe to cancel the Delete Assets dialog that is currently showing?