To uninstall xbuilder just follow these instructions.
sudo apt-get remove xbuilder
This will remove just the xbuilder package itself.
sudo apt-get remove --auto-remove xbuilder
This will remove the xbuilder package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xbuilder then this will work.
sudo apt-get purge xbuilder
Or similarly, like this xbuilder
sudo apt-get purge --auto-remove xbuilder
|Description||Tool to cross-build a list of packages using sbuild, xdeb or pdebuild-cross using various methods, on a list of source packages. It also has a simple cross-bootstraping helper (using build-profiles), and scripts for generating html tables summarising the results of a build run, and generating the packagelists to build.|