package management – How to remove non-launchpad-ppa repository from apt update list?

When I run sudo apt update, it hits/gets a list of urls, including Hit:7 bionic InRelease.

How do I remove this specific url from what apt updates?

I’ve found all kinds of ways of removing a known ppa, but I don’t have a ppa or launchpad address for this one. It also does not show up in /etc/apt/sources.list.d.

Here is what shows up for this url in apt policy:

500 bionic/main i386 Packages
     release o=Artifactory,a=bionic,n=bionic,l=Artifactory,c=main,b=i386
 500 bionic/main amd64 Packages
     release o=Artifactory,a=bionic,n=bionic,l=Artifactory,c=main,b=amd64

Feel free to correct any mis-used terms.