Removing suspend/hibernate from KDE menu

I'm using OpenSuse 13.1 with KDE and have been trying to remove the suspend & hibernate options from the KDE menu. What I've tried so far:

• PolicyKit files in /usr/share/polkit-1/actions (changing allow_active for all permissions related to suspend/hibernate to "no")
• Adding related policies (e.g. org.freedesktop.login1.suspend) to /etc/polkit-defaults-privs.local
• Replacing pm-is-supported with a script that does just "exit 1"

Despite doing this the options are still there and I can still suspend the system as a regular user.

Any help would be greatly appreciated.