Removing Previous/Next Posts from a post

Hi,

How do you delete that previous/next post bar below post?

Apologies, I have went through the forum searching for an answer, and of course I found several possible solutions but none of them seem to work.

To be honest I have a loose interpretation of this website, but really am not familiar with .css

Any pointers on how to remove them?

https://www.petrest.com/replacement-nylon-training-collar/

Thanks!