message: Re-enable windowed reduction tests
  Summary:
  Re-enabling windowed reduction tests now that poplibs handles windows
  wholey within the padding region.
  Test Plan: Exsiting tests all passing
  Reviewers: georgep
diff: @@ -266,6 +266,4 @@ TokenHloTest.TokenTree POPLAR
  TokenHloTest.TokenInConditional POPLAR
  TupleHloTest.NonAmbiguousTopLevelAllocation POPLAR
  -R4ReduceWindowTest POPLAR // Issues with zero size windows
  -
  IotaTest POPLAR // Don't support iota
  