Laravel Cache leaving empty folders

I am using Cache to save login sessions for mobile application users. I am on Laravel 4. Any time someone logs out I empty their session token using:

Cache::forget($token);

The problem is this leaves a couple of empty folders that were initially created to save the cache file. I fear having many empty folders in the app/storage/cache folder is going to reduce the fetch time for reading cache data in the future.

How do I erase the two parent folders of the cache file along with the file when i run the Cache::forget function?

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