To uninstall xserver-xorg-input-evdev just follow these instructions.
sudo apt-get remove xserver-xorg-input-evdev
This will remove just the xserver-xorg-input-evdev package itself.
sudo apt-get remove --auto-remove xserver-xorg-input-evdev
This will remove the xserver-xorg-input-evdev package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xserver-xorg-input-evdev then this will work.
sudo apt-get purge xserver-xorg-input-evdev
Or similarly, like this xserver-xorg-input-evdev
sudo apt-get purge --auto-remove xserver-xorg-input-evdev
|Maintainer||Debian X Strike Force <email@example.com>|
|Description||X.Org X server -- evdev input driver kernel's event delivery mechanism. This driver allows for multiple keyboards and mice to be treated as separate input devices.|