Laravel delete a file

I am trying to delete a file that I upload in a folder in the storage directory called avatars and I can delete it with unlink but storage disk does not work.

This works but

unlink(storage_path($url_local));

this does not

$test = Storage::delete(storage_path($url_local));

I looked at the source code and I do not see anything that would make it not work. I have used disk('local') and that does not work either.