YaST can be used to uninstall the Linux boot loader and restore the MBR to the state prior to the installation of Linux. During the installation, YaST automatically creates a backup copy of the original MBR and restores it on request, overwriting GRUB.
To uninstall GRUB, start the YaST boot loader module (-> ). In the first dialog, select -> and exit the dialog with . In the MBR, GRUB is overwritten with the data of the original MBR.