[BE] do not retain/release tensor (pytorch#150075)

`Tensor::as_strided__symint` is inplace op that returns self, no need to retain it

Pull Request resolved: pytorch#150075
Approved by: https://github.com/angelayi, https://github.com/atalman, https://github.com/cyyever

Author: malfet

aten/src/ATen/native/TensorShape.cpp

@@ -3614,7 +3614,7 @@ Tensor& transpose_(Tensor& self, int64_t dim0, int64_t dim1) {
   std::swap(sizes[dim0], sizes[dim1]);
   SymDimVector strides(self.sym_strides().begin(), self.sym_strides().end());
   std::swap(strides[dim0], strides[dim1]);
-  auto result = self.as_strided__symint(std::move(sizes), std::move(strides));
+  self.as_strided__symint(std::move(sizes), std::move(strides));
   return self;
 }