$ sudo apt-get remove idesk 

Uninstall idesk including dependent package

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

$ sudo apt-get remove --auto-remove idesk 

Use Purging idesk

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

$ sudo apt-get purge idesk 

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 idesk 

See Also,