Inline useless single use local variable

src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java

@@ -169,8 +169,7 @@ public abstract class AbstractMultiSetTest<T> extends AbstractCollectionTest<T>
      */
     @Override
     public Collection<T> makeConfirmedCollection() {
-        final ArrayList<T> list = new ArrayList<>();
-        return list;
+        return new ArrayList<>();
     }
 
     /**