Fixed failing GPU test.

Author: Miguel Alonso Jr

ml-agents/mlagents/torch_utils/torch.py

@@ -53,7 +53,7 @@ def set_torch_config(torch_settings: TorchSettings) -> None:
 
     if _device.type == "cuda":
         torch.set_default_device(_device.type)
-        torch.set_default_dtype(torch.cuda.FloatTensor)
+        torch.set_default_dtype(torch.float32)
     else:
         torch.set_default_dtype(torch.float32)
     logger.debug(f"default Torch device: {_device}")

ml-agents/mlagents/trainers/tests/test_torch_utils.py

@@ -11,8 +11,8 @@
     "device_str, expected_type, expected_index, expected_tensor_type",
     [
         ("cpu", "cpu", None, torch.float32),
-        ("cuda", "cuda", None, torch.cuda.FloatTensor),
-        ("cuda:42", "cuda", 42, torch.cuda.FloatTensor),
+        ("cuda", "cuda", None, torch.float32),
+        ("cuda:42", "cuda", 42, torch.float32),
         ("opengl", "opengl", None, torch.float32),
     ],
 )