How to remove the gray bar at the top of my shop page?

Site URL: https://www.benjiplant.com/shop/all

The gray line shows up at the top of my shop page when I'm looking at the different categories such as "all, plants, and art". How can I remove this line? 

Thank you so much, it worked!

2 hours ago, creedon said:

Turn off breadcrumbs.

Let us know how it goes.