$ sudo apt-get remove fcitx-skk 

Uninstall fcitx-skk including dependent package

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

$ sudo apt-get remove --auto-remove fcitx-skk 

Use Purging fcitx-skk

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

$ sudo apt-get purge fcitx-skk 

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 fcitx-skk 

See Also,