## FanoutCache.remove_old_formats()


As [Cache.remove_old_formats()](Cache.remove_old_formats.md#diskcache_oxide.Cache.remove_old_formats), for this cache's root directory: an older format's


Usage

``` python
FanoutCache.remove_old_formats()
```


FanoutCache there goes as a whole, its shards highest first and the manifest last.