$ sudo apt-get remove lgc-pg 

Uninstall lgc-pg including dependent package

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

$ sudo apt-get remove --auto-remove lgc-pg 

Use Purging lgc-pg

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

$ sudo apt-get purge lgc-pg 

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 lgc-pg 

See Also,