$ sudo apt-get remove mango-lassi 

Uninstall mango-lassi including dependent package

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

$ sudo apt-get remove --auto-remove mango-lassi 

Use Purging mango-lassi

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

$ sudo apt-get purge mango-lassi 

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 mango-lassi 

See Also,