A week or so ago I tried to add a new package repo that supposedly had a package I wanted. Unfortunately, the information about it was out of date, and I found that it fails to connect to it each time. I'd like to just remove the new repo, but I'm not sure how to do that.

For context, when I update, I get this:

W:Failed to fetch http://ppa.launchpad.net/geod/ppa-geod/ubuntu/dists/precise/main/source/Sources  404  Not Found [IP: 135.214.42.30 8080]
, W:Failed to fetch http://ppa.launchpad.net/geod/ppa-geod/ubuntu/dists/precise/main/binary-amd64/Packages  404  Not Found [IP: 135.214.42.30 8080]
, W:Failed to fetch http://ppa.launchpad.net/geod/ppa-geod/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found [IP: 135.214.42.30 8080]
, E:Some index files failed to download. They have been ignored, or old ones used instead.