To uninstall debci-worker just follow these instructions.
/debian/stretch/main///install/index.html continuous integration system for Debian (worker daemon) Debian 9.0 devel 1.5.1
sudo apt-get remove debci-worker
Which will remove just the debci-worker package itself.
sudo apt-get remove --auto-remove debci-worker
This will remove the debci-worker package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for debci-worker then this will work.
sudo apt-get purge debci-worker
Or similarly, like this debci-worker
sudo apt-get purge --auto-remove debci-worker
|Description||continuous integration system for Debian (worker daemon)|