I'm interested in cleaning up my codeigniter applications folder (just to clean up the clutter). I've seen a few applications that only include the important folder (ex. controllers, models, views, config) and do away with alot of the other stuff (like logs, hooks etc.)
Does someone know which folders can be deleted and which are required?
Thanks
Consider that this "clean up" won't bring you this great advantages, apart from your personal feelings. Since Codeigniter tries to look into application folders which are named like the system ones (libraries, core..) before going to search for those folders inside the "system", I don't think it will be painless to remove them; you might try, though, and just keep those which, very likely, contain somethin: config,controllers,errors,models,views.
Another thing you could do, and which will free more "space" (are you worried about file count?), is deleting unused/unwanted helpers and libraries (from the system folder); the ones you are damn sure you don't use and never will in the future (like the javascript library, for ex, plainly useless, or the smiley helper...You got the point).
All in all, apart from the feeling of "having cleaned up your workspace", I don't really see what benefit this will bring you. But, if you really, really feel so strongly inclined to, make a back-up copy and start deleting, you can always put them back if CI yells at you.