cuda.core: update PyTorch example to use native __cuda_stream__

Signed-off-by: Ralf Juengling <rjuengling@nvidia.com>

Author: juenglin

cuda_core/examples/pytorch_example.py

@@ -32,24 +32,14 @@
 """
 
 
-# Create a wrapper class that implements __cuda_stream__
-class PyTorchStreamWrapper:
-    def __init__(self, pt_stream):
-        self.pt_stream = pt_stream
-
-    def __cuda_stream__(self):
-        stream_id = self.pt_stream.cuda_stream
-        return (0, stream_id)  # Return format required by CUDA Python
-
-
 def main():
     dev = Device()
     dev.set_current()
 
     pt_stream = torch.cuda.current_stream()
     print(f"PyTorch stream: {pt_stream}", file=sys.stderr)
 
-    stream = dev.create_stream(PyTorchStreamWrapper(pt_stream))
+    stream = dev.create_stream(pt_stream)
 
     try:
         # prepare program