Remove Phh's superuser?
You should try this using es file explorer. 
In the dash board of es file explorer, go to tools then turn on  the switch for root explorer. After that consider turning recycle bin on for later restores. Next tap on root explorer and a subwindow should open . Select Mount R/W. That's rewrite permission. Still there, you can select uninstall system apps. It should work well. Proceed with caution and at your own risk