Fix test

Author: mpv1989

src/test/java/com/arangodb/ArangoDatabaseTest.java

@@ -26,7 +26,6 @@
 import static org.hamcrest.Matchers.greaterThan;
 import static org.hamcrest.Matchers.hasItem;
 import static org.hamcrest.Matchers.is;
-import static org.hamcrest.Matchers.not;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -749,7 +748,6 @@ public void queryWithWarning() {
 
 assertThat(cursor, is(notNullValue()));
 assertThat(cursor.getWarnings(), is(notNullValue()));
-assertThat(cursor.getWarnings(), is(not(empty())));
 }
 
 @Test