Should not print warning if there's no inconsistent_metadata

Shouldn't this log not printed if there's no inconsistent_metadata?
This is causing our error log alarm to trigger false alarm
```
{
    "timestamp": "2019-04-23T10:20:35.225+0000",
    "level": "warn",
    "type": "startup",
    "detail": {
        "kind": "inconsistent_metadata",
        "info": {
            "objects": []
        }
    }
}
```