message: Use the 2D asym padding interface
diff: @@ -85,12 +85,6 @@ CreateConv2D(poplar::Graph &graph,
  unsigned int ph_y = window.dimensions(0).padding_high();
  unsigned int ph_x = window.dimensions(1).padding_high();
  - if (pl_y != ph_y || pl_x != ph_x) {
  - return port::Status(
  - port::error::FAILED_PRECONDITION,
  - port::StrCat("Unequal paddings not supported on ", inst->name()));
  - }
  -
  poplar::Tensor conv_in = popconv::createInput(graph, dtype,
  n_b, n_y, n_x, n_i,
  f_y, f_x, n_o,
  