To uninstall libkml0 just follow these instructions.
sudo apt-get remove libkml0
This will remove just the libkml0 package itself.
sudo apt-get remove --auto-remove libkml0
This will remove the libkml0 package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for libkml0 then this will work.
sudo apt-get purge libkml0
Or similarly, like this libkml0
sudo apt-get purge --auto-remove libkml0
|Maintainer||Debian GIS Project <email@example.com>|
|Description||Library to manipulate KML 2.2 OGC standard files|