$ sudo apt-get remove mustang 

Uninstall mustang including dependent package

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

$ sudo apt-get remove --auto-remove mustang 

Use Purging mustang

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

$ sudo apt-get purge mustang 

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 mustang 

See Also,