Your system might contain several empty folders which you may not find out. These are of no use and so you could delete these from the system. But how to find them out if you doesn’t know the actual position of these unwanted folders.
There are many softwares for finding the empty folders scattered in your system. Fast Empty Folder Finder is one such software. With it you could easily get a list of the empty folders present in your system so that you could delete them from the system.