$ sudo apt-get remove libxcomp3 

Uninstall libxcomp3 including dependent package

If you would like to remove libxcomp3 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libxcomp3 

Use Purging libxcomp3

If you use with purge options to libxcomp3 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libxcomp3 

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 libxcomp3 

See Also,