$ sudo apt-get remove libinput-pad1 

Uninstall libinput-pad1 including dependent package

If you would like to remove libinput-pad1 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libinput-pad1 

Use Purging libinput-pad1

If you use with purge options to libinput-pad1 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libinput-pad1 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove libinput-pad1 

See Also,