The Nirsoft program shows all instances of USB usage on the system, including phones, Webcams, cameras, mouse etc. Double clicking on the .exe will open up a window showing you all the devices ever used. From there, you can locate the device, right-click on it and select "Open in reg-edit". From there you can see where the information is stored.
You can choose to delete the particular registry entry you wish. Just be careful which entries you delete as certain bits of required hardware will need to retain the registry values and may stop working if removed. Make a backup of any key you plan to delete before doing this, and create a restore point first.
Though, all this seems a pretty fruitless exercise.