$ sudo apt-get remove libgpod4 

Uninstall libgpod4 including dependent package

If you would like to remove libgpod4 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libgpod4 

Use Purging libgpod4

If you use with purge options to libgpod4 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libgpod4 

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 libgpod4 

See Also,