Revert "Add deterministic path for CUDA cumsum (#136224)"

This reverts commit d45b0151e5d9a9358368b9fbd7fa454edd5d9709.

Reverted https://github.com/pytorch/pytorch/pull/136224 on behalf of https://github.com/atalman due to Failing internall CI ([comment](https://github.com/pytorch/pytorch/pull/136224#issuecomment-2369244135))

torch/_torch_docs.py

@@ -3317,6 +3317,38 @@ Example::
 """.format(**reduceops_common_args),
 )
 
+add_docstr(
+    torch.cumsum,
+    r"""
+cumsum(input, dim, *, dtype=None, out=None) -> Tensor
+
+Returns the cumulative sum of elements of :attr:`input` in the dimension
+:attr:`dim`.
+
+For example, if :attr:`input` is a vector of size N, the result will also be
+a vector of size N, with elements.
+
+.. math::
+    y_i = x_1 + x_2 + x_3 + \dots + x_i
+
+Args:
+    {input}
+    dim  (int): the dimension to do the operation over
+
+Keyword args:
+    {dtype}
+    {out}
+
+Example::
+
+    >>> a = torch.randint(1, 20, (10,))
+    >>> a
+    tensor([13,  7,  3, 10, 13,  3, 15, 10,  9, 10])
+    >>> torch.cumsum(a, dim=0)
+    tensor([13, 20, 23, 33, 46, 49, 64, 74, 83, 93])
+""".format(**reduceops_common_args),
+)
+
 add_docstr(
     torch.count_nonzero,
     r"""