Removed unused import.

51048544 · Greg Messner · 548b6fa0 · 51048544
Commit 51048544 authored Dec 15, 2018 by Greg Messner
--- a/src/test/java/org/gitlab4j/api/TestAvatarUpload.java
+++ b/src/test/java/org/gitlab4j/api/TestAvatarUpload.java
 package org.gitlab4j.api;

 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assume.assumeTrue;