Remove a no longer used file. (#2802)

python/pyngraph/pyngraph_onnx_import.cpp

-//*****************************************************************************
-// Copyright 2017-2019 Intel Corporation
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//*****************************************************************************
-#include <pybind11/pybind11.h>
-
-#include "pyngraph/onnx_import/onnx_import.hpp"
-
-namespace py = pybind11;
-
-PYBIND11_MODULE(_pyngraph_onnx_import, m)
-{
-    m.doc() = "Package ngraph.impl that wraps ngraph::onnx_import";
-    regmodule_pyngraph_onnx_import(m);
-}