This [question on Stack Overflow][1] suggests that deleting files should help. If you have multiple WYSIWYG editors, remove all that you don't need. Some of the editor plugins (like fckeditor) have an *unbelievable* number of files.

However, since it's shared hosting it's likely that the message is caused by the number of files across *all the sites* on the server. I would contact your host about it; they probably have too many sites on one server.


  [1]: http://stackoverflow.com/questions/653096/howto-free-inode-usage