Clear warning message from torch

pytensor/link/pytorch/dispatch/basic.py

@@ -123,7 +123,10 @@ def arange(start, stop, step):
 def pytorch_funcify_Join(op, **kwargs):
     def join(axis, *tensors):
         # tensors could also be tuples, and in this case they don't have a ndim
-        tensors = [torch.tensor(tensor) for tensor in tensors]
+        tensors = [
+            torch.tensor(tensor) if not torch.is_tensor(tensor) else tensor
+            for tensor in tensors
+        ]
 
         return torch.cat(tensors, dim=axis)