$ sudo apt-get remove notes-app 

Uninstall notes-app including dependent package

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

$ sudo apt-get remove --auto-remove notes-app 

Use Purging notes-app

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

$ sudo apt-get purge notes-app 

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 notes-app 

See Also,