title: Pytorch find unique vectors in tensor
body: <p>I have a tensor containing binary values e.g</p>
  <pre><code>T1 = torch.tensor([[1., 0., 1.],
      [0., 1., 0.],
      [1., 0., 1.]])
  </code></pre>
  <p>i need to convert this to:</p>
  <pre><code>tensor([[1., 0., 1.],
          [0., 1., 0.]])
  </code></pre>
  <p>I looked into <code>torch.unique</code> but it only works for values?</p>
  <p>Is there a way to do the unique operation across entire vectors</p>