Update CreateBroadcast.java

Author: SMadani

src/main/java/com/vonage/quickstart/video/CreateBroadcast.java

@@ -18,7 +18,6 @@
 import com.vonage.client.VonageClient;
 import com.vonage.client.video.*;
 import static com.vonage.quickstart.EnvironmentVariables.*;
-import com.vonage.quickstart.util.JsonPrinter;
 import java.time.Duration;
 
 public class CreateBroadcast {