Mention that create_slots_for_pins can be used to get opensc-onepin behavior.
Remove the bogus javacard "driver".

I had some ideas on how to improve the experience for JavaCards
but that path did not get implemented further and my approach now
is very different.

While it would be nice if OpenSC (command line) detected
somehow blank JavaCard-s and informed the user that steps a-b-c
should be taken to make use of it, it doesn't really fit in.