$ sudo apt-get remove kfind 

Uninstall kfind including dependent package

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

$ sudo apt-get remove --auto-remove kfind 

Use Purging kfind

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

$ sudo apt-get purge kfind 

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 kfind 

See Also,