No..... you don't ever have to clean it out.Ok well if u do the deep litter method u have to clean it out once a year or more and u don't have to turn it or dig through it to get the manure the chickens turn through it and helps it decompose
Here's a great description of contents and how to manage organic 'litter' in a run or coop...and there's a great video of what it looks like.
https://www.backyardchickens.com/t/1037998/muddy-run-help-please#post_16017992