Changes x.numpy().squeeze(0) to tf.squeeze(x, 0).numpy() as per the suggestion in https://github.com/deepmind/acme/pull/169
Changes x.numpy().squeeze(0) to tf.squeeze(x, 0).numpy() as per the suggestion in https://github.com/deepmind/acme/pull/169

PiperOrigin-RevId: 420758556
Change-Id: Ic0216dea05e4da21d06bfaa3f6fd083aff164aab

deepmind/acme,deepmind/acme