YaST can be used to uninstall the Linux boot loader and restore the MBR to the state it had 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.