code: @BetaApi
    public final Operation deleteAccessConfigInstance(
        ProjectZoneInstanceName instance, String networkInterface, String accessConfig) {
  
      DeleteAccessConfigInstanceHttpRequest request =
          DeleteAccessConfigInstanceHttpRequest.newBuilder()
              .setInstance(instance == null ? null : instance.toString())
              .setNetworkInterface(networkInterface)
              .setAccessConfig(accessConfig)
              .build();
      return deleteAccessConfigInstance(request);
    }
docs: Deletes an access config from an instance's network interface.
  
  <p>Sample code:
  
  <pre><code>
  try (InstanceClient instanceClient = InstanceClient.create()) {
  ProjectZoneInstanceName instance = ProjectZoneInstanceName.of("[PROJECT]", "[ZONE]", "[INSTANCE]");
  String networkInterface = "";
  String accessConfig = "";
  Operation response = instanceClient.deleteAccessConfigInstance(instance, networkInterface, accessConfig);
  }
  </code></pre>
  
  @param instance The instance name for this request.
  @param networkInterface The name of the network interface.
  @param accessConfig The name of the access config to delete.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails