To uninstall atfs-dev just follow these instructions.
/debian/stretch/main///install/index.html Attributed File System (AtFS development libraries) Debian 9.0 libdevel 1.4pl6-13
sudo apt-get remove atfs-dev
Which will remove just the atfs-dev package itself.
sudo apt-get remove --auto-remove atfs-dev
This will remove the atfs-dev package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for atfs-dev then this will work.
sudo apt-get purge atfs-dev
Or similarly, like this atfs-dev
sudo apt-get purge --auto-remove atfs-dev
|Description||Attributed File System (AtFS development libraries)|