Delete useless code upsample (#5392)

* add argmax test

* fix ci error

* fix docstring warning

* fix tensor greater and less bug

* fix conflict

* add test_flow_xxx_against_pytorch func

* delete useless code

* delete useless code

Co-authored-by: oneflow-ci-bot <69100618+oneflow-ci-bot@users.noreply.github.com>

oneflow/user/ops/upsample_op.cpp

@@ -60,8 +60,6 @@ REGISTER_USER_OP("upsample_grad")
     .SetTensorDescInferFn([](user_op::InferContext* ctx) -> Maybe<void> {
       const Shape& dy_shape = ctx->InputShape("dy", 0);
       Shape* dx_shape = ctx->OutputShape("dx", 0);
-      const float height_scale = ctx->Attr<float>("height_scale");
-      const float width_scale = ctx->Attr<float>("width_scale");
       if (ctx->Attr<std::string>("data_format") != "channels_first" || dy_shape.NumAxes() != 4) {
         LOG(FATAL) << "upsample_nearest only supports NCHW";
       }