Remove broken CentOS 8 CI tests

Author: Alex-Welsh

terraform/github/terraform.tfvars.json

@@ -346,8 +346,6 @@
         "Tox pep8 with Python 3.8",
         "Tox releasenotes with Python 3.8",
         "Build Kayobe Image / Build kayobe image",
-        "aio (CentOS OVS) / All in one",
-        "aio (CentOS OVN) / All in one",
         "aio (Rocky OVS) / All in one",
         "aio (Rocky OVN) / All in one",
         "aio (Ubuntu OVS) / All in one",