Remove Docker's PPA repository

I'm using WSL so using the PPA Gui isn't a possibility. I added the Docker PPA with this command:

sudo add-apt-repository \"deb [arch=amd64] https://download.docker.com/linux/ubuntu \   $(lsb_release -cs) \   stable"

And I'm able to see it with this command:

$ apt policy

relevant lines:

500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages     release o=Docker,a=bionic,l=Docker CE,c=stable,b=amd64     origin download.docker.com

But how can I remove this repository without GUI access? I've tried various permutations of:

sudo apt-add-repository --remove ppa:ABC/DEF

with no success