[Genesis] Remove pop-up post navigation

If you'd like to remove the adjacent post navigation that pops up in our Audrey, Charlotte, Harper, or Mia themes, here are instructions:

1. Click here and copy the code.
2. Go to WordPress > Appearance > Customize > Additional CSS.
3. Paste the code in the box, and then click Publish to save.

On mobile, the pop-up post navigation becomes static below each blog post. If you'd like the post navigation removed from desktop AND mobile, copy this code instead for step 1.