I have the iPhone 4S, not jailbroken. I didn't think there was ANY way to do delete it, but it no longer is on my phone. Also, when a hook my phone up to my computer, I am unable to re-arrange my icons. Just sort of grayed out. I might add my 3 year old granddaughter had my phone, but I don't think she could have done this.
I realize that in the realm of problems, these are very small, but they are annoying and confusing!
Thanks, guys! Apparently the 3 year old did do the deed. Now everything is password locked. I anticipate her figuring that out fairly soon. She's awfully good at working no only my phone, but her parents' Android phones.