title: Do defaults need to be supplied for Firebase RemoteConfig?
body: <p>Supplying defaults is one of the steps when using RemoteConfig. It usually looks something like this:</p>
  
  <pre><code>let sefaults: [String: NSObject] = [
          "key1" : "value1" as NSObject,
          "key2" : "value2" as NSObject
      ]
  FIRRemoteConfig.remoteConfig().setDefaults(defaults)
  </code></pre>
  
  <p>I've found RemoteConfig works perfectly fine without the above. Is the above necessary? Also, what is it doing? Seems to be a no-op.</p>