I've never seen anything mentioned about either of these folders here or at XDA, so they must not be a problem. Remember, the Android OS is designed to be very good at multitasking and using things only when they are needed. So my guess would be that having these folders on our phones is not hurting the operation of the phone. So unless you are a developer who knows what they are, probably best to leave them where they are. They may have been created by some other program or app, do nothing but sit there until that program or app needs them, and may actually be important to the functioning of that program or app.