Revert "Parse the updated json instead of deprecated core-os.net"
Revert "Parse the updated json instead of deprecated core-os.net"

This reverts commit d2029d1170022fe609930d0d67f9d1afa83e9fe0.

kz8s/terraform-aws-coreos-kubernetes,yagonobre/tack,kz8s/tack,ii/cncfdemo