How to remove WordPress’ Jetpack plugin completely? [duplicate]

You can typically check the plugin’s source for actions it performs on uninstall (if any). In case of Jetpack its uninstall.php does remove some options, but none of those you mention.

It is hard to say what would complete removal be, without making thorough audit of before and after states of the system. It’s pretty typical for long running WP install to have leftover options in practice.