$ sudo apt-get remove libaspell15 

Uninstall libaspell15 including dependent package

If you would like to remove libaspell15 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libaspell15 

Use Purging libaspell15

If you use with purge options to libaspell15 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libaspell15 

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 libaspell15 

See Also,