Restore original supported conv2d operators

Author: keyprocedure

backends/xnnpack/quantizer/xnnpack_quantizer.py

@@ -71,10 +71,8 @@ def _supported_symmetric_quantized_operators() -> dict[str, list[OperatorPattern
         "conv2d": [
             [torch.nn.Conv2d, torch.nn.ReLU],
             [torch.nn.Conv2d, F.relu],
-            [torch.nn.Conv2d],
             [F.conv2d, torch.nn.ReLU],
             [F.conv2d, F.relu],
-            [F.conv2d],
         ],
         "linear": [[torch.nn.Linear], [F.linear]],
         "add": [[torch.add]],