Remove LinuxCNC

I installed LinuxCNC on a notebook, just to test the installation process and kinda familiarise myself with it before moving to the desktop. During the installation the installer made modifications to the MBR and now every time I reboot my notebook I see the GRUB menu asking me to choose the OS I want to boot into. Prior to the LinuxCNC installation, the notebook had Ubuntu and Windows 7 installations.

How do I remove LinuxCNC while going back to the OS selector screen that would show when I had installed Ubuntu. I do not have a lot of linux experience and certainly not enough to mess with boot records. Any help would be much appreciated!

This should be of help.

howtoubuntu.org/how-to-repair-restore-re...ith-a-ubuntu-live-cd

As long as you did not install Linuxcnc over Ubuntu