Drupal core 7.67 / Ubercart 7.x-3.13
Seeing as we are a premium business, we don't really do the discounting thing.
We have no need for List price being shown to users when they look at one of our products
So, how to prevent it from being displayed?
First, go to the Manage Display area of Product within the Content types area of the website, then change the Format to Hidden:
Click on Save
Now, List price should be gone.