heroku/heroku — pull request #1001 by deafbybeheading (2014-01-16 23:04:37+00:00)
Title: Never use the PGBACKUPS_URL from the environment

It's not clear from the history why this was introduced in the first
place, but the only conceivable use I can think of is testing against
a staging version of PGBackups, but that can easily be done by
actually adding the staging add-on to an app.