Revert "Allow NetKey cards with Version 15"

Authored by aheinecke on Jul 6 2018, 6:19 AM.

Description

Revert "Allow NetKey cards with Version 15"

It was a misunderstanding that they work. Netkey
V15 is not yet supported.

This reverts commit e609c1782ee8a0a844ab630c6968a796f4a7e712.