Now you can unjailbreak your your iPhone, iPad or iPod Touch device without updating iOS. The newly released Cydia Impactor allows you to remove Jailbreak easily. You can follow below tutorial for how to download Cydia Impactor for Remove Jailbreak without updating iOS : http://cydiajailbreak.org/how-to-remove-ios-8-4-jailbreak-using-cydia-impactor-download/