You have to reinstall kate through installer. Open the app up, and uncheck all of the features you want to remove, tap install, and reboot. Then it is safe to uninstall kate.
**EDIT***
if your installer keeps giving you permission issues, download iDemocracy 3 from here:
http://drakenza.com/Downloads.html
iDemocracy 3 is like ziphone, but with many more features. Open iDemocracy, connect your iphone via usb, click Modify > extras then in the dropbad select "fix installer app permissions" That should do the trick. also, if you ever need to restore again, i suggest using idemocracy to jailbreak instead of ziphone, idemocracy is much safer and much more efficient.