Default [Q] How to remove OTA downloaded Kitkat firmware

hi,

I have recently received the Kitkat 4.4 OTA download for Kitkat for my Galaxy S4. Having heard issues with the SDcard access by certain apps, I would prefer to remain on Jellybean 4.3. However, having received the firmware downloaded onto my S4, I keep getting reminders to update my firmware every 3 hours (maximum that I can delay it).

Is there a way to delete the downloaded Kitkat 4.4 firmware? I don't have much space on my S4 internal storage and I would like to remove it as well as the irritating notifications. My S4 is not rooted.

Thanks for any help!