Suppress 'unsused' warning in SpoilerTest

smack-experimental/src/test/java/org/jivesoftware/smackx/spoiler/SpoilerTest.java

@@ -116,11 +116,13 @@ public class SpoilerTest extends SmackTestSuite {
 
     @Test(expected = IllegalArgumentException.class)
     public void spoilerCheckArgumentsNullTest() {
+        @SuppressWarnings("unused")
         SpoilerElement spoilerElement = new SpoilerElement("de", null);
     }
 
     @Test(expected = IllegalArgumentException.class)
     public void spoilerCheckArgumentsEmptyTest() {
+        @SuppressWarnings("unused")
         SpoilerElement spoilerElement = new SpoilerElement("de", "");
     }
 }