Update gpytorch/kernels/kernel.py

Co-authored-by: Max Balandat <[email protected]>

Author: gpleiss

gpytorch/kernels/kernel.py

@@ -76,7 +76,7 @@ def _dist(self, x1, x2, x1_eq_x2=False, postprocess=False):
         return self._postprocess(res) if postprocess else res
 
 
-class _autograd_kernel_hack(object):
+class _autograd_kernel_hack:
     """
     Helper class.