In the unlikely event you decide Norman isn't the keyboard layout for you, the following are the uninstallation instructions for the Norman installers for Windows and Mac.
Navigate to the standard uninstall window in Control Panel. Uninstall the entry named "US - Norman".
Decompress the install dmg archive. Navigate to the "extras" directory using Terminal and execute the uninstall.sh script. Otherwise, you could just
The script does the following command:
sudo /bin/rm -r /Library/Keyboard\ Layouts/Norman.bundle
Alternatively, you could just move the bundle to the trash through Finder, as shown in the screenshot.