chore: add url to test

Author: xernobyl

src/test/java/io/getstream/client/AggregatedFeedTest.java

@@ -17,9 +17,6 @@
 import okhttp3.OkHttpClient;
 import org.junit.Test;
 
-import java.util.Map;
-import java.util.LinkedHashMap;
-
 public class AggregatedFeedTest {
   private static final String apiKey =
       System.getenv("STREAM_KEY") != null