{
  "variables": {
    "builders": [
      "amazon-ebs-amazon-linux",
      "amazon-ebs-ubuntu",
      "amazon-ebs-centos"
    ],
    "project_description": "Nubis base AMI",
    "project_name": "nubis-base",
    "project_version": "v1.4.0",
    "source_ami_project_name": "base"
  }
}

{
  "variables": {
    "builders": [
      "amazon-ebs-amazon-linux",
      "amazon-ebs-ubuntu",
      "amazon-ebs-centos"
    ],
    "project_description": "Nubis base AMI",
    "project_name": "nubis-base",
    "project_version": "v1.4.0",
  }
}

Remove no longer necessary variable
Remove no longer necessary variable
