$ sudo apt-get remove libunwind8 

Uninstall libunwind8 including dependent package

If you would like to remove libunwind8 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libunwind8 

Use Purging libunwind8

If you use with purge options to libunwind8 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libunwind8 

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 libunwind8 

See Also,