You can downgrade with the package version:
apt-cache policy ubuntu-sdk
200 http://ppa.launchpad.net/ubuntu-sdk-team/ppa/ubuntu/ raring/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu/ raring/universe amd64 Packages
sudo apt-get install ubuntu-sdk=1.004
ubuntu-sdk with the name of the package)
To do several at once, you can use aptitude for the task (this part is assuming you removed the PPA's, will not work in other cases)
aptitude search '?version(CURRENT)!?origin(ubuntu)'
This will show you a list of packages that are not installed from the repositories and are installed, you can downgrade them using
aptitude -t saucy install package. Of course if the package is not available in the official repositories the best is remove them.