Merge pull request #1824 from annapmeyer/issue1823

Remove call to detach() on a numpy array

Author: beat-buesser

art/estimators/regression/pytorch.py

@@ -269,7 +269,7 @@ def predict(  # pylint: disable=W0221
             output = model_outputs[-1]
             output = output.detach().cpu().numpy().astype(np.float32)
             if len(output.shape) == 1:
-                output = np.expand_dims(output.detach().cpu().numpy(), axis=1).astype(np.float32)
+                output = np.expand_dims(output, axis=1).astype(np.float32)
 
             results_list.append(output)