removed packages from distribution.yaml are still here

[vrabaud]

For example, the following package is still here:
http://packages.ros.org/ros-shadow-fixed/ubuntu/pool/main/r/ros-indigo-nao-msgs/
While the package is not in the distribution.yaml anymore and the build jobs got removed.
And they also still appear in: http://www.ros.org/debbuild/hydro.html?q=yellow
Thx !
(it's just that with an LTS, I suppose a lot of packages will be removed over time)

[tfoote]

thanks for pointing it out. I knew the sourcedebs stayed around, but didn't realize that some of the binaries stuck around. Most of them get cleared out if they have a dependency on something that invalidates them. But if they don't get cleared by the invalidation sweep then they will never get cleaned up.

Cleaning them is a little tricky to make sure not to clean too much. This will require a script which checks a regex for ros-DISTRO-* and checks if they're in the distro. That's basically what yellow means.