bugfix: adjust remote scan to severspec v2

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
bugfix: remove os detectoin (for now)

Due to changes in serverspec and specinfra, this method doesn't work anymore. We'll change the way operating system support is handled during the next commits, as we have to decide which OSes we support and which we don't, apart from pure serverspec support of these systems.

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>