Remove printing from CustomGradientTest

Signed-off-by: Ryan Nett <[email protected]>

Author: rnett

tensorflow-core/tensorflow-core-api/src/test/java/org/tensorflow/CustomGradientTest.java

@@ -57,21 +57,14 @@ public void testCustomGradient() {
 
       Ops tf = Ops.create(g);
       Output<TFloat32> x = tf.placeholder(TFloat32.class).output();
-      Output<TFloat32> y = tf.nn.nthElement(x, tf.constant(2)).asOutput();
+      Output<TFloat32> y =
+          tf.math.add(tf.nn.nthElement(x, tf.constant(2)), tf.constant(4f)).asOutput();
 
       Output<?>[] grads0 = g.addGradients(y, toArray(x));
       assertNotNull(grads0);
       assertEquals(1, grads0.length);
       assertEquals(DataType.DT_FLOAT, grads0[0].dataType());
 
-      //      System.out.println(
-      //          StreamSupport.stream(
-      //                  Spliterators.spliteratorUnknownSize(
-      //                      g.operations(), Spliterator.ORDERED | Spliterator.NONNULL),
-      //                  false)
-      //              .map(GraphOperation::name)
-      //              .collect(Collectors.toList()));
-
       try (TFloat32 c1 = TFloat32.vectorOf(3.0f, 2.0f, 1.0f, 0.0f);
           AutoCloseableList<Tensor> outputs =
               new AutoCloseableList<>(s.runner().feed(x, c1).fetch(grads0[0]).run())) {