Revert "qa_crobarsetup: enable serial console for deployed nodes"
Revert "qa_crobarsetup: enable serial console for deployed nodes"

This reverts commit ef654e216d330fa254f447e2197818af6518b24d.

Turns out that you can no longer follow the installation process
in YaST if the serial console is enabled.

gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,vmoravec/automation,vmoravec/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,SUSE-Cloud/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,aspiers/automation,vmoravec/automation,vmoravec/automation