message: [relay] Remove classic code from config.
diff: import { NativeModules } from "react-native"
  -import * as Relay from "react-relay/classic"
  const { Emission } = NativeModules
  let metaphysicsURL
  @@ -15,17 +14,6 @@ if (Emission && Emission.gravityAPIHost && Emission.metaphysicsAPIHost) {
  export { metaphysicsURL, gravityURL }
  -if (Emission) {
  - Relay.injectNetworkLayer(
  - new Relay.DefaultNetworkLayer(metaphysicsURL, {
  - headers: {
  - "X-USER-ID": Emission.userID,
  - "X-ACCESS-TOKEN": Emission.authenticationToken,
  - },
  - })
  - )
  -}
  -
  // Disable the native polyfill during development, which will make network requests show-up in the Chrome dev-tools.
  // Specifically, in our case, we get to see the Relay requests.
  //
  