Revert of Add domain-specific language for BPF policies

sandbox/linux/bpf_dsl/cons_unittest.cc

-// Copyright 2014 The Chromium 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 "sandbox/linux/bpf_dsl/cons.h"
-
-#include <string>
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace sandbox {
-namespace {
-
-std::string Join(Cons<char>::List char_list) {
-  std::string res;
-  for (Cons<char>::List it = char_list; it; it = it->tail()) {
-    res.push_back(it->head());
-  }
-  return res;
-}
-
-TEST(ConsListTest, Basic) {
-  Cons<char>::List ba =
-      Cons<char>::Make('b', Cons<char>::Make('a', Cons<char>::List()));
-  EXPECT_EQ("ba", Join(ba));
-
-  Cons<char>::List cba = Cons<char>::Make('c', ba);
-  Cons<char>::List dba = Cons<char>::Make('d', ba);
-  EXPECT_EQ("cba", Join(cba));
-  EXPECT_EQ("dba", Join(dba));
-}
-
-}  // namespace
-}  // namespace sandbox