From 1d15866172612d043cce3640f4bffb42b21347ba Mon Sep 17 00:00:00 2001
From: Fritz Obermeyer <fritz.obermeyer@gmail.com>
Date: Fri, 8 Jul 2022 10:02:27 -0400
Subject: [PATCH] Allow autocorrelation() to run without mkl

---
 pyro/ops/stats.py | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/pyro/ops/stats.py b/pyro/ops/stats.py
index 3f24ed2e41..6f906f43fc 100644
--- a/pyro/ops/stats.py
+++ b/pyro/ops/stats.py
@@ -93,11 +93,6 @@ def autocorrelation(input, dim=0):
     :param int dim: the dimension to calculate autocorrelation.
     :returns torch.Tensor: autocorrelation of ``input``.
     """
-    if (not input.is_cuda) and (not torch.backends.mkl.is_available()):
-        raise NotImplementedError(
-            "For CPU tensor, this method is only supported " "with MKL installed."
-        )
-
     # Adapted from Stan implementation
     # https://github.com/stan-dev/math/blob/develop/stan/math/prim/mat/fun/autocorrelation.hpp
     N = input.size(dim)