$ sudo apt-get remove libcogl15 

Uninstall libcogl15 including dependent package

If you would like to remove libcogl15 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libcogl15 

Use Purging libcogl15

If you use with purge options to libcogl15 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libcogl15 

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 libcogl15 

See Also,