delete some ignore files

ff-GPGPU.h

-//==============================================================
-// Copyright  2021 Intel Corporation
-//
-// SPDX-License-Identifier: MIT
-// =============================================================
-#pragma once
-
-#ifdef DPCPP_DLL_EXPORTS
-#define DPCPP_DLL_API __declspec(dllexport)
-#else
-#define DPCPP_DLL_API __declspec(dllimport)
-#endif
-
-#include <array>
-#include <iostream>
-
-// ARRAY type & data size for use in this example
-constexpr size_t array_size = 10000;
-using IntArray=std::array<int, array_size>;
-
-DPCPP_DLL_API void initialize_array(IntArray &a);
-DPCPP_DLL_API void vector_add(const IntArray &addend_1, const IntArray &addend_2, IntArray &sum_parallel);