Revert "[inspector] add inspector protocol parser test build target for GYP."

test/inspector_protocol_parser_test/RunTests.cpp

-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace {
-
-class InspectorProtocolTestEnvironment final : public ::testing::Environment {};
-
-}  // namespace
-
-int main(int argc, char** argv) {
-  testing::InitGoogleMock(&argc, argv);
-  testing::AddGlobalTestEnvironment(new InspectorProtocolTestEnvironment);
-  return RUN_ALL_TESTS();
-}