chromeos/test/data/network/toplevel_wifi_remove.onc

{
  "NetworkConfigurations": [
    {
      "GUID": "{485d6076-dd44-6b6d-69787465725f5045}",
      "Type": "WiFi",
      "Name": "My WiFi Network",
      "Remove": true,
    }
  ],
  "Certificates": [],
  "Type": "UnencryptedConfiguration"
}